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Cover	3 Months Ended
Cover	Mar. 31, 2020
Cover [Abstract]
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Entity Registrant Name	Mistras Group, Inc.
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2020	May 11, 2020
Document and Entity Information
Entity Registrant Name	Mistras Group, Inc.
Entity Central Index Key	0001436126
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Document Quarterly Report	true
Document Transition Report	false
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		29,074,110
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 17,027	$ 15,016
Accounts receivable, net	125,130	135,997
Inventories	13,510	13,413
Prepaid expenses and other current assets	13,151	14,729
Total current assets	168,818	179,155
Property, plant and equipment, net	94,971	98,607
Intangible assets, net	72,019	109,537
Goodwill	196,289	282,410
Deferred income taxes	1,910	1,786
Other assets	49,538	48,383
Total assets	583,545	719,878
Current Liabilities
Accounts payable	13,110	15,033
Accrued expenses and other current liabilities	75,156	81,389
Current portion of long-term debt	7,240	6,593
Current portion of finance lease obligations	3,847	4,131
Income taxes payable	2,067	2,094
Total current liabilities	101,420	109,240
Long-term debt, net of current portion	250,786	248,120
Obligations under finance leases, net of current portion	12,401	13,043
Deferred income taxes	6,761	21,290
Other long-term liabilities	40,424	42,163
Total liabilities	411,792	433,856
Commitments and contingencies
Equity
Preferred stock, 10,000,000 shares authorized	0	0
Common stock, $0.01 par value, 200,000,000 shares authorized, 29,042,069 and 28,945,472 shares issued	290	289
Additional paid-in capital	230,472	229,205
Retained earnings (deficit)	(20,896)	77,613
Accumulated other comprehensive loss	(38,294)	(21,285)
Total Mistras Group, Inc. stockholders’ equity	171,572	285,822
Non-controlling interests	181	200
Total equity	171,753	286,022
Total liabilities and equity	$ 583,545	$ 719,878

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	29,042,069	28,945,472

Unaudited Condensed Consolidated Statements of Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 159,465	$ 176,787
Cost of revenue	113,324	122,417
Depreciation	5,497	5,496
Gross profit	40,644	48,874
Selling, general and administrative expenses	41,558	41,763
Bad debt provision for troubled customers, net of recoveries	0	5,491
Impairment charges	106,062	0
Pension withdrawal expense	0	534
Research and engineering	824	857
Depreciation and amortization	3,970	4,172
Acquisition-related expense (benefit), net	(542)	453
Loss from operations	(111,228)	(4,396)
Interest expense	2,789	3,527
Loss before provision (benefit) for income taxes	(114,017)	(7,923)
Benefit for income taxes	(15,495)	(2,637)
Net loss	(98,522)	(5,286)
Less: Net income (loss) attributable to non-controlling interests, net of taxes	(13)	7
Net loss attributable to Mistras Group, Inc.	$ (98,509)	$ (5,293)
Earnings (loss) per common share:
Basic (in dollars per share)	$ (3.40)	$ (0.19)
Diluted (in dollars per share)	$ (3.40)	$ (0.19)
Weighted-average common shares outstanding:
Basic (in shares)	28,963	28,574
Diluted (in shares)	28,963	28,574

Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (98,522)	$ (5,286)
Other comprehensive income (loss):
Foreign currency translation adjustments	(17,009)	2,131
Comprehensive loss	(115,531)	(3,155)
Less: comprehensive income (loss) attributable to non-controlling interest	(19)	9
Comprehensive loss attributable to Mistras Group, Inc.	$ (115,512)	$ (3,164)

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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+ Details

Unaudited Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Total Mistras Group, Inc. Stockholders’ Equity	Common Stock	Additional paid-in capital	Retained earnings (deficit)	Accumulated other comprehensive income (loss)	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2018			28,563
Beginning balance at Dec. 31, 2018	$ 271,074	$ 270,897	$ 285	$ 226,616	$ 71,553	$ (27,557)	$ 177
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(5,286)	(5,293)			(5,293)		7
Other comprehensive loss, net of tax	2,133	2,131				2,131	2
Share-base payments (in shares)			61
Share-based payments	1,427	1,427	$ 1	1,426
Net settlement of restricted stock units	$ (284)	(284)		(284)
Exercise of stock options (in shares)	4		3
Exercise of stock options	$ 32	32		32
Ending balance (in shares) at Mar. 31, 2019			28,627
Ending balance at Mar. 31, 2019	269,096	268,910	$ 286	227,790	66,260	(25,426)	186
Beginning balance (in shares) at Dec. 31, 2019			28,945
Beginning balance at Dec. 31, 2019	286,022	285,822	$ 289	229,205	77,613	(21,285)	200
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(98,522)	(98,509)			(98,509)		(13)
Other comprehensive loss, net of tax	(17,015)	(17,009)				(17,009)	(6)
Share-based payments	1,425	1,425		1,425
Net settlements of restricted stock units (in shares)			97
Net settlement of restricted stock units	$ (157)	(157)	$ 1	(158)
Exercise of stock options (in shares)	0
Ending balance (in shares) at Mar. 31, 2020			29,042
Ending balance at Mar. 31, 2020	$ 171,753	$ 171,572	$ 290	$ 230,472	$ (20,896)	$ (38,294)	$ 181

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (98,522)	$ (5,286)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	9,467	9,668
Impairment charges	106,062	0
Deferred income taxes	(13,739)	244
Share-based compensation expense	1,345	1,356
Bad debt provision for troubled customers, net of recoveries	0	5,491
Fair value adjustments to contingent consideration	(542)	305
Foreign currency (gain) loss	307	(647)
Other	76	(163)
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions
Accounts receivable	7,884	4,904
Inventories	(405)	(505)
Prepaid expenses and other assets	(985)	(5,425)
Accounts payable	(1,526)	(541)
Accrued expenses and other liabilities	(3,315)	(3,189)
Income taxes payable	0	1,965
Net cash provided by operating activities	6,107	8,177
Cash flows from investing activities
Purchase of property, plant and equipment	(4,301)	(5,637)
Purchase of intangible assets	(87)	(88)
Proceeds from sale of equipment	184	724
Net cash used in investing activities	(4,204)	(5,001)
Cash flows from financing activities
Repayment of finance lease obligations	(1,167)	(1,124)
Proceeds from borrowings of long-term debt	280	121
Repayment of long-term debt	(1,639)	(1,694)
Proceeds from revolver	13,500	6,500
Repayment of revolver	(8,500)	(7,500)
Payment of financing costs	(522)	0
Payment of contingent consideration for business acquisitions	(1,303)	0
Taxes paid related to net share settlement of share-based awards	(157)	(284)
Proceeds from exercise of stock options	0	32
Net cash provided by (used in) financing activities	492	(3,949)
Effect of exchange rate changes on cash and cash equivalents	(384)	(171)
Net change in cash and cash equivalents	2,011	(944)
Cash and cash equivalents at beginning of period	15,016	25,544
Cash and cash equivalents at end of period	17,027	24,600
Supplemental disclosure of cash paid
Interest	2,726	3,428
Income taxes	61	1,091
Noncash investing and financing
Equipment acquired through finance lease obligations	$ 667	$ 1,086

Description of Business and Basis of Presentation	3 Months Ended
Description of Business and Basis of Presentation	Mar. 31, 2020
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Description of Business Mistras Group, Inc. and subsidiaries ("the Company") is a leading “one source” global provider of technology-enabled asset protection solutions used to evaluate the structural integrity and reliability of critical energy, industrial, public infrastructure and commercial aerospace components. The Company combines industry-leading products and technologies, expertise in mechanical integrity (MI), non-destructive testing (NDT) and mechanical services and proprietary data analysis software to deliver a comprehensive portfolio of customized solutions, ranging from routine inspections to complex, plant-wide asset integrity assessments and management. These mission critical solutions enhance customers’ ability to extend the useful life of their assets, increase productivity, minimize repair costs, comply with governmental safety and environmental regulations, manage risk and avoid catastrophic disasters. The Company serves a global customer base of companies with asset-intensive infrastructure, including companies in the oil and gas, commercial aerospace and defense, fossil and nuclear power, alternative and renewable energy, public infrastructure, chemicals, transportation, primary metals and metalworking, pharmaceutical/biotechnology and food processing industries and research and engineering institutions. Recent Developments In March 2020, the World Health Organization declared the outbreak of a novel coronavirus (COVID-19) as a pandemic, which continues to spread throughout the United States. The COVID-19 pandemic has caused significant volatility in domestic and international markets. There is on-going uncertainty around the breadth and duration of business disruptions related to COVID-19, as well as its impact on the U.S. and international economies. In addition, oil prices have dropped significantly, and airline traffic has experienced a significant decline. These declines were driven by the uncertainty surrounding the COVID-19 pandemic and, in the case of the oil and gas market, other macroeconomic events such as the geopolitical tensions between OPEC and Russia, which also resulted in a significant drop in oil prices. The COVID-19 pandemic and significant drop in oil prices has adversely affected the Company's workforce and operations, as well as the operations of its customers, suppliers and contractors. These negative factors have also resulted in significant volatility and uncertainty in the markets in which the Company operates. To successfully navigate through this unprecedented period, the Company continues to focus on the following key priorities: •Ensuring the health and safety of its employees and those of its customers and suppliers; •Maintaining business continuity and financial strength and stability; and •Serving its customers as they provide essential products and services to the world. While the Company cannot fully assess the impact that the COVID-19 pandemic or the significant drop in oil prices will have on its operations at this time, there are certain impacts that the Company has identified: •The financial market volatility that resulted from COVID-19 and the drop in oil prices required the Company to reassess the goodwill it had recorded related to various prior acquisitions under the guidance of ASC 350. The Company determined that the fair values of various reporting units were less than their carrying values (including goodwill). As a result, the Company recorded an impairment charge related to goodwill of approximately $77.1 million in the three months ended March 31, 2020. See Note 8–Goodwill. •This same financial market volatility required the Company to reassess the tangible and intangible assets recorded under the guidance of ASC 360. The Company determined that the fair values of certain asset groups were less than their carrying values (excluding goodwill). As a result, the Company recorded impairment charges related to intangible assets of approximately $28.8 million and a right-of-use asset of approximately $0.2 million in the three months ended March 31, 2020. See Note 9–Intangible Assets and Note 13–Leases. •As of March 31, 2020, the Company was in compliance with the terms of its $300 million revolving line of credit and $100 million senior secured term loan A facility provided by its banking group. Given the uncertainty of the Company's projected cash flows as a result of the impact of the COVID-19 pandemic and the drop in oil prices, the Company entered into an amendment on May 15, 2020 with its banking group that, among other provisions, modifies the current financial covenants. The Company believes that it is probable, based on the amended covenants, that the Company will be able to comply with the amended covenants and fulfil its obligations under the credit agreement; however, such matters cannot be predicted with certainty. See Note 11–Long-Term Debt. To respond to the economic downturn resulting from the COVID-19 pandemic and the drop in oil prices, the Company has initiated a cost reduction and efficiency program. All named executive officers of the Company have voluntarily taken temporary salary reductions ranging from 25% to 45% of their base salary. In addition, the Company instituted a reduction for its other salaried employees, at lower percentages, and suspended the Company's voluntary match under the Company sponsored savings plans for its U.S. and Canadian employees. These reductions are for the second quarter of 2020. If the economic downturn continues beyond the second quarter and there is no sign of economic recovery for the Company or its industry, the Company will assess whether to change these cost saving measures. In addition, the Company’s non-employee directors voluntarily agreed to a $3,750 reduction in their second quarter 2020 payment. The Company is currently unable to predict with certainty the overall impact that the COVID-19 pandemic and drop in oil prices may have on its business, results of operations, or liquidity. The Company may be impacted by the pandemic and drop in oil prices in other ways which the Company cannot yet determine. The Company will continue to monitor market conditions and respond accordingly. Basis of Presentation The condensed consolidated financial statements contained in this report are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results for the interim periods of the years ending December 31, 2020 and December 31, 2019. Certain items included in these statements are based on management’s estimates. Actual results may differ from those estimates. The results of operations for any interim period are not necessarily indicative of the results expected for the year. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the notes to the audited consolidated financial statements contained in the 2019 Annual Report. Principles of Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Mistras Group, Inc. and its wholly and majority-owned subsidiaries. For subsidiaries in which the Company’s ownership interest is less than 100%, the non-controlling interests are reported in stockholders’ equity in the accompanying Condensed Consolidated Balance Sheets. The non-controlling interests in net results, net of tax, is classified separately in the accompanying Unaudited Condensed Consolidated Statements of Income (Loss). All significant intercompany accounts and transactions have been eliminated in consolidation. Reclassification Certain amounts in prior periods have been reclassified to conform to the current year presentation. Such reclassifications did not have a material effect on the Company's financial condition or results of operations as previously reported. Customers For each of the three months ended March 31, 2020 and 2019, no customer represented 10% or more of the Company's revenue. Significant Accounting Policies The Company’s significant accounting policies are disclosed in Note 1–Summary of Significant Accounting Policies and Practices in the 2019 Annual Report. On an ongoing basis, the Company evaluates its estimates and assumptions, including among other things, those related to revenue recognition, long-lived assets, goodwill and acquisitions. Since the date of the 2019 Annual Report, there have been no material changes to the Company's significant accounting policies. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax credit carry-forwards. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is provided if it is more likely than not that some or all of a deferred income tax asset will not be realized. Financial accounting standards prescribe a minimum recognition threshold a tax position is required to meet before being recognized in the financial statements. These standards also provide guidance on de-recognition, measurement, and classification of amounts relating to uncertain tax positions, accounting for and disclosure of interest and penalties, accounting in interim periods and disclosures required. Interest and penalties related to unrecognized tax positions are recognized as incurred within “provision for income taxes” in the consolidated statements of income. ASC 740-270, Income Taxes-Interim Reporting, requires the Company to use an estimated annual effective tax rate (EAETR) for calculating its tax provision for interim periods. At each interim period, the Company is required, with certain exceptions and limitations, to estimate its forecasted worldwide EAETR, which is applied to the Company's year-to-date consolidated ordinary income or loss resulting in the year-to-date income tax provision before considering items not included in ordinary income or loss. The tax effects of events or transactions not considered to represent ordinary income or loss are accounted for discretely in the interim period and are not included in the determination of the EAETR. In response to the COVID-19 pandemic, the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was signed into law on March 27, 2020. The CARES Act, among other things, includes tax provisions relating to deferment of employer’s social security payments, net operating loss utilization and carryback periods, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property (QIP). The ultimate impact of the CARES Act may differ from the estimated impact the Company recorded during this interim period due to changes in interpretations and guidance that may be issued and actions the Company may take in response to the CARES Act. The Company will continue to assess the impact that various provisions will have on its business. The Company continues to evaluate its deferred tax assets each period to determine if a valuation allowance is required based on whether it is more likely than not that some portion of these deferred tax assets will not be realized. As of March 31, 2020, management concluded that it is more likely than not that a substantial portion of the Company's deferred tax assets will be realized. As part of the Company's analysis, it considered both positive and negative factors that impact profitability and whether those factors would lead to a change in the estimate of the Company's deferred tax assets that may be realized in the future. In the current period, the Company began to see impacts on its business as a result of the COVID-19 pandemic. The Company will continue to monitor the impacts of the COVID-19 pandemic on its business, and any sustained or prolonged reductions in future earnings periods may change the Company's conclusions on whether it is more likely than not to realize portions of the Company's deferred tax assets. The Company’s effective income tax rate was approximately 14% and 33% for the three months ended March 31, 2020 and 2019, respectively. The effective income tax rate for the three months ended March 31, 2020 was lower than the statutory rate primarily due to impairments recorded during the interim period for which no income tax benefits will be realized by us. However, this unfavorable impact on the Company's effective income tax rate was partially offset by income tax benefits of the CARES Act. The CARES Act provides a five-year carryback of net operating losses generated in years 2018-2020. As the statutory federal income tax rate applicable to certain years within the carryback period is 35%, carryback to those years of the Company's estimated 2020 annual tax loss provides a tax benefit in excess of the current federal statutory rate of 21%, resulting in an increased income tax benefit. The Company projects that the income tax effects of the CARES Act will result in additional income tax benefit recognized throughout the 2020 tax year as part of the estimated annual effective tax rate, and a cash refund in 2021 of taxes paid in prior years. The effective income tax rate for the three months ended March 31, 2019 was higher than the statutory rate due to the impact of discrete items, the global intangible low-taxes income (GILTI), and executive compensation, and other provisions resulting from the December 22, 2017 passage of the Tax Cuts and Jobs Act and foreign tax rates different than statutory rates in the U.S. Recent Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of deferred tax liabilities related to outside basis differences. The standard is effective for interim and annual periods beginning January 1, 2021, with certain amendments applied prospectively and others requiring retrospective application. Early adoption is permitted, with any adjustments reflected as of the beginning of the fiscal year of adoption. If early adoption is elected, all changes as a result of the standard must be adopted in the same period. The Company is currently evaluating the impact of this guidance on its consolidated financial position, results of operations, and cash flows. In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The guidance provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another rate that is expected to be discontinued. The amendments in ASU 2020-04 are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of this guidance on its consolidated financial position, results of operations, and cash flows.

Revenue

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue

The majority of the Company's revenues are derived from providing services on a time and material basis and are short-term in nature. The Company accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is the unit of account in ASC Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company's contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and is, therefore, not distinct. The Company provides highly integrated and bundled inspection services to its customers. Some of the Company's contracts have multiple performance obligations, most commonly due to the contract providing both goods and services. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using its best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is a relative selling price based on price lists.

Contract modifications are not routine in the performance of the Company contracts. Generally, when contracts are modified, the modification is to account for changes in scope to the goods and services that are provided. In most instances, contract modifications are for goods or services that are distinct, and, therefore, are accounted for as a separate contract.

The Company's performance obligations are satisfied over time as work progresses or at a point in time. The majority of the Company's revenue recognized over time as work progresses is related to its service deliverables, which includes providing testing, inspection and mechanical services to the Company's customers. Revenue is recognized over time based on time and material incurred to date which best portrays the transfer of control to the customer. The Company also utilizes an available practical expedient that provides for revenue to be recognized in an amount that corresponds directly with the value to the customer of the entity’s performance completed to date. Fixed fee arrangements are determined based on expected labor, material, and overhead to be consumed on fulfillment of such services. Revenue is recognized on a cost-to-cost method tracked on an input basis.

The majority of the Company's revenue recognized at a point in time is related to product sales when the customer obtains control of the asset, which is generally upon shipment to the customer. Contract costs include labor, material and overhead.

The Company expects any significant remaining performance obligations to be satisfied within one year.

Contract Estimates

The majority of the Company's revenues are short-term in nature. The Company has many master service agreements (MSAs) that specify an overall framework and contract terms when the Company and customers agree upon services or products to be provided. The actual contracting to provide services or furnish products is triggered by a work order, purchase order, or some similar document issued pursuant to a MSA which sets forth the scope of services and/or identifies the products to be provided. From time-to-time, the Company may enter into long-term contracts, which can range from several months to several years. Revenue on such long-term contracts is recognized as work is performed based on total costs incurred to date in relation to the total estimated costs for the performance of the contract at completion. This includes contract estimates of costs to be incurred for the performance of the contract. Cost estimation is based upon the professional knowledge and experience of the Company's project managers, engineers and financial professionals. Factors that are considered in estimating the work to be completed include the availability of materials, the effect of any delays in the Company's project performance and the recoverability of any claims. Whenever revisions of estimates, contract costs and/or contract values indicate that the contract costs will exceed estimated revenues, thus creating a loss, a provision for the total estimated loss is recorded in that period.

Revenue by Category

The following series of tables present the Company's disaggregated revenues:

Revenue by industry was as follows:


Three Months Ended March 31, 2020	Services		International		Products		Corp/Elim		Total
Oil & Gas	$	83,299	$	9,104	$	95	$	—	$	92,498
Aerospace & Defense	14,652		7,415		147		—		22,214
Industrials	12,867		4,919		488		—		18,274
Power generation & Transmission	5,095		1,697		854		—		7,646
Other Process Industries	6,004		2,120		3		—		8,127
Infrastructure, Research & Engineering	4,517		2,461		560		—		7,538
Other	2,439		1,351		665		(1,287)		3,168
Total	$	128,873	$	29,067	$	2,812	$	(1,287)	$	159,465


Three Months Ended March 31, 2019	Services		International		Products		Corp/Elim		Total
Oil & Gas	$	91,666	$	9,704	$	15	$	—	$	101,385
Aerospace & Defense	12,794		11,654		307		—		24,755
Industrials	16,123		5,075		432		—		21,630
Power generation & Transmission	6,262		1,422		1,380		—		9,064
Other Process Industries	6,319		2,242		5		—		8,566
Infrastructure, Research & Engineering	2,590		2,733		847		—		6,170
Other	4,544		2,332		446		(2,105)		5,217
Total	$	140,298	$	35,162	$	3,432	$	(2,105)	$	176,787

Revenue per key geographic location was as follows:


Three Months Ended March 31, 2020	Services		International		Products		Corp/Elim		Total
United States	$	109,581	$	154	$	1,559	$	(711)	$	110,583
Other Americas	18,735		1,505		278		(153)		20,365
Europe	108		26,235		340		(379)		26,304
Asia-Pacific	449		1,173		635		(44)		2,213
Total	$	128,873	$	29,067	$	2,812	$	(1,287)	$	159,465


Three Months Ended March 31, 2019	Services		International		Products		Corp/Elim		Total
United States	$	113,136	$	276	$	1,970	$	(1,282)	$	114,100
Other Americas	26,708		2,229		66		(56)		28,947
Europe	428		31,540		421		(763)		31,626
Asia-Pacific	26		1,117		975		(4)		2,114
Total	$	140,298	$	35,162	$	3,432	$	(2,105)	$	176,787

Contract Balances

The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and customer advances and deposits (contract liabilities) on the Condensed Consolidated Balance Sheets. Amounts are generally billed as work progresses in accordance with agreed-upon contractual terms, generally at periodic intervals (e.g., weekly, bi-weekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, the Company sometimes receives advances or deposits from its customers before revenue is recognized, resulting in contract liabilities. These assets and liabilities are aggregated on an individual contract basis and reported on the Condensed Consolidated Balance Sheets at the end of each reporting period within accounts receivables or accrued expenses and other current liabilities.

Revenue recognized during the three months ended March 31, 2020 and 2019 that was included in the contract liability balance at the beginning of such year was $1.6 million and $1.8 million, respectively. Changes in the contract asset and liability balances during these periods were not materially impacted by any other factors. The Company has elected to utilize a practical expedient to expense incremental costs incurred related to obtaining a contract. The Company’s expenses are expected to be amortized over a period less than one year.

Share-Based Compensation

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Share-Based Compensation

The Company has share-based incentive awards outstanding to its eligible employees and non-employee directors under two equity incentive plans: (i) the 2009 Long-Term Incentive Plan (the "2009 Plan") and (ii) the 2016 Long-Term Incentive Plan (the "2016 Plan"). No further awards may be granted under the 2009 Plan, although awards granted under the 2009 Plan remain outstanding in accordance with their terms. Awards granted under the 2016 Plan may be in the form of stock options, restricted stock units and other forms of share-based incentives, including performance restricted stock units, stock appreciation rights and deferred stock rights.

Stock Options

For the three months ended March 31, 2020 and 2019, the Company did not recognize any share-based compensation expense related to stock option awards, as all outstanding stock options awards were then already fully vested. No unrecognized compensation costs remained related to stock option awards as of March 31, 2020.

The following table sets forth a summary of the stock option activity, weighted-average exercise prices and options outstanding as of March 31, 2020 and March 31, 2019:


	Three months ended March 31,
	2020				2019
	Common Stock Options	Weighted Average Exercise Price		Common Stock Options	Weighted Average Exercise Price
Outstanding at beginning of period:	5	$	22.35	2,105	$	13.47
Granted	—	$	—	—	$	—
Exercised	—	$	—	(4)	$	10.00
Expired or forfeited	—	$	—	—	$	—
Outstanding at end of period:	5	$	22.35	2,101	$	13.47

Restricted Stock Unit Awards

For the three months ended March 31, 2020 and March 31, 2019, the Company recognized share-based compensation expense related to restricted stock unit awards of $1.1 million and $0.9 million, respectively. As of March 31, 2020, there was $5.8 million of unrecognized compensation costs, net of estimated forfeitures, related to restricted stock unit awards, which is expected to be recognized over a remaining weighted-average period of 2.2 years. Upon vesting, restricted stock units are generally net share-settled to cover the required withholding tax and the remaining amount is converted into an equivalent number of shares of common stock.

A summary of the vesting activity of restricted stock unit awards, with the respective fair value of the awards, is as follows:


	Three months ended March 31,
	2020		2019
Restricted stock awards vested	120		50
Fair value of awards vested	$	454	$	693

A summary of the fully-vested common stock the Company issued to its six non-employee directors, in connection with its non-employee director compensation plan, is as follows:


	Three months ended March 31,
	2020		2019
Awards issued	—		14
Grant date fair value of awards issued	$	—	$	200

A summary of the Company's outstanding, non-vested restricted share units is as follows:


	Three months ended March 31,
	2020				2019
	Units	Weighted Average Grant-Date Fair Value		Units	Weighted Average Grant-Date Fair Value
Outstanding at beginning of period:	559	$	16.92	443	$	20.55
Granted	—	$	—	334	$	14.04
Released	(120)	$	15.87	(50)	$	19.21
Forfeited	(3)	$	16.34	(8)	$	20.78
Outstanding at end of period:	436	$	17.21	719	$	17.61

Performance Restricted Stock Units

The Company maintains Performance Restricted Stock Units (PRSUs) that have been granted to select executives and senior officers whose ultimate payout is based on the Company’s performance over a one-year period based on specific metrics approved by the Compensation Committee of the Board of Directors of the Company. For 2019, three metrics, as defined: (1) Operating Income, (2) Adjusted EBITDAS (defined as net income attributable to MISTRAS Group, Inc. plus: interest expense, provision for income taxes, depreciation and amortization, share-based compensation expense and certain acquisition related costs (including transaction due diligence costs and adjustments to the fair value of contingent consideration), foreign exchange (gain) loss and, if applicable, certain special items which are noted) and (3) Revenue. There also is a discretionary portion of the PRSUs based on individual performance, granted at the discretion of the Compensation Committee (Discretionary PRSUs). PRSUs and Discretionary PRSUs generally vest ratably on each of the first four anniversary dates upon completion of the performance period, for a total requisite service period of up to five years and have no dividend rights.

PRSUs are equity-classified and compensation costs are initially measured using the fair value of the underlying stock at the date of grant, assuming that the target performance conditions will be achieved. Compensation costs related to the PRSUs are subsequently adjusted for changes in the expected outcomes of the performance conditions.

Discretionary PRSUs are liability-classified and adjusted to fair value (with a corresponding adjustment to compensation expense) based upon the targeted number of shares to be awarded and the fair value of the underlying stock each reporting period until approved by the Compensation Committee, at which point they are equity-classified.

A summary of the Company's PRSU activity is as follows:


	Three months ended March 31,
	2020				2019
	Units	Weighted Average Grant-Date Fair Value		Units	Weighted Average Grant-Date Fair Value
Outstanding at beginning of period:	260	$	16.77	277	$	17.80
Granted	—	$	—	—	$	—
Performance condition adjustments	1	$	13.63	(3)	$	18.46
Released	(19)	$	19.46	(17)	$	20.22
Forfeited	—	$	—	—	$	—
Outstanding at end of period:	242	$	15.42	257	$	17.35

During the three months ended March 31, 2020 and March 31, 2019, the Compensation Committee approved the final calculation of the award metrics for calendar year 2019 and calendar year 2018, respectively. As a result, the calendar year 2019 PRSUs increased by approximately 1,000 units and the calendar year 2018 PRSUs decreased by approximately 3,000 units.

For the three months ended March 31, 2020 and March 31, 2019, the Company recognized aggregate share-based compensation expense related to the awards described above of approximately $0.3 million and $0.2 million, respectively. At March 31, 2020, there was $1.2 million of total unrecognized compensation costs related to approximately 242,000 non-vested PRSUs, which is expected to be recognized over a remaining weighted-average period of 1.9 years.

For 2020, the Compensation Committee is changing the criteria to four metrics with no discretionary portion. Revenue and Adjusted EBITDAS are being retained, and two additional metrics, free cash flow as a percentage of revenue and return on average book equity, will replace Operating Income. These two newly-added metrics are relative metrics, the performance of which are based upon how the Company performs relative to a peer group. However, due to the COVID-19 pandemic and the health and economic upheaval it has created, no targets have been established yet for the Revenue and Adjusted EBITDAS metrics for 2020. In addition, the Company does not have sufficient shares remaining in the 2016 Plan for the 2020 target grants, so no grants will be made unless and until the Company's shareholders approve a proposed amendment to the 2016 Plan to increase the number of shares authorized for issuance under the plan. Approval of the proposed amendment is being sought at the 2020 annual shareholders meeting scheduled for May 19, 2020. As such, no shares have been granted, in the first quarter

of 2020, as noted in the table above. The Company expects these awards to be finalized and approved by its Compensation Committee during the second quarter of 2020 if shareholders approve the proposed amendment to the 2016 Plan.

Earnings (loss) per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings (loss) per Share

Basic earnings (loss) per share is computed by dividing net income by the weighted-average number of shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the sum of (1) the weighted-average number of shares of common stock outstanding during the period, and (2) the dilutive effect of assumed conversion of equity awards using the treasury stock method. With respect to the number of weighted-average shares outstanding (denominator), diluted shares reflects: (i) the exercise of options to acquire common stock to the extent that the options’ exercise prices are less than the average market price of common shares during the period and (ii) the pro forma vesting of restricted stock units.

The following table sets forth the computations of basic and diluted earnings per share:


	Three months ended
	March 31, 2020		March 31, 2019

Basic earnings (loss) per share:
Numerator:
Net loss attributable to Mistras Group, Inc.	$	(98,509)	$	(5,293)
Denominator:
Weighted-average common shares outstanding	28,963		28,574
Basic earnings (loss) per share	$	(3.40)	$	(0.19)

Diluted earnings (loss) per share:
Numerator:
Net loss attributable to Mistras Group, Inc.	$	(98,509)	$	(5,293)
Denominator:
Weighted-average common shares outstanding	28,963		28,574
Dilutive effect of stock options outstanding^{(1), (2)}	—		—
Dilutive effect of restricted stock units outstanding^{(1), (2)}	—		—
	28,963		28,574
Diluted earnings (loss) per share	$	(3.40)	$	(0.19)

_______________

⁽¹⁾For the three months ended March 31, 2020, 99 shares related to restricted stock were excluded from the calculation of diluted EPS due to the net loss for the period.

⁽²⁾ For the three months ended March 31, 2019, 212 and 168 shares related to stock options and restricted stock, respectively, were excluded from the calculation of diluted EPS due to the net loss for the period.

Acquisitions and Dispositions

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Acquisitions and Dispositions

Acquisitions

The Company did not complete any acquisitions during the three months ended March 31, 2020 or 2019, respectively. During September 2019, the Company completed one acquisition that provides pipeline integrity management software and services to energy transportation companies. The Company acquired all the equity interest of the acquiree in exchange for aggregate consideration of $4.4 million in cash, contingent consideration of up to $4.3 million to be earned based upon the acquired business achieving specific performance metrics over the initial three years of operations from the acquisition date and working capital adjustments. The goodwill recorded is primarily attributable to expected synergies and is generally fully deductible for

tax purposes. The Company is still in the process of completing its valuation of the assets acquired and liabilities assumed. The Company accounted for this transaction in accordance with the acquisition method of accounting for business combinations.

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed, the Company's allocation of purchase price and any subsequent adjustments made for the September 2019 acquisition:






Cash paid	$	4,380
Working capital adjustments	(152)
Fair value of contingent consideration	1,142
Total consideration	$	5,370

Current net assets	$	142
Other assets	34
Property, plant and equipment	65
Intangibles	3,594
Goodwill	1,535
Net assets acquired	$	5,370

Acquisition-Related Expense

In the course of its acquisition activities, the Company incurs costs in connection with due diligence, such as professional fees, and other expenses. Additionally, the Company adjusts the fair value of acquisition-related contingent consideration liabilities on a quarterly basis. These amounts are reported as Acquisition-related expense, net on the Unaudited Condensed Consolidated Statements of Income (Loss) and were as follows for the three months ended March 31, 2020 and 2019:


	Three months ended March 31,
	2020		2019
Due diligence, professional fees and other transaction costs	$	—	$	148
Adjustments to fair value of contingent consideration liabilities	(542)		305
Acquisition-related expense, net	$	(542)	$	453

The Company's contingent consideration liabilities are included in Accrued expenses and other current liabilities and Other long-term liabilities on the Condensed Consolidated Balance Sheets.

Accounts Receivable, net

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Accounts Receivable, net

Accounts receivable consisted of the following:


	March 31, 2020		December 31, 2019

Trade accounts receivable	$	132,905	$	144,282
Allowance for doubtful accounts	(7,775)		(8,285)
Accounts receivable, net	$	125,130	$	135,997

The Company had $19.1 million and $22.2 million of unbilled revenues accrued as of March 31, 2020 and December 31, 2019, respectively. These amounts are included in the trade accounts receivable balances above. Unbilled revenues are generally billed in the subsequent quarter to their revenue recognition.

The Company was contracted to perform inspections of welds on various pipeline projects in Texas for a customer. As of March 31, 2020, approximately $1.4 million of past due receivables were outstanding from this customer. The Company received notice from the customer in December 2019, alleging that the work performed was not in compliance with the contract. The Company filed a lawsuit to recover the $1.4 million and other amounts due to the Company and the customer filed a counterclaim, alleging breach of contract and seeking its damages. Accordingly, the Company recorded a full reserve in the amount of $1.4 million during the second half of 2019 for these past due receivables. There have not been any changes during 2020. See Note 14–Commitments and Contingencies for additional details.

In the fourth quarter of 2018, the Company recorded a reserve of $0.7 million for a renewable energy industry customer, based in part on the available information about the financial difficulties of the customer. During the first quarter of 2019, the Company recorded an additional charge of $5.7 million to fully reserve for the amount of the exposure related to this customer. This customer filed for a voluntary insolvency proceeding on April 9, 2019. During the second quarter of 2019, the Company reversed $1.0 million of this reserve based on additional information obtained during the quarter. There have not been any changes since the second quarter of 2019.

During 2019, the Company sold to an unaffiliated third party, without recourse, its remaining outstanding receivables owed from a customer which filed for bankruptcy, and for which the Company had initially recorded a charge during the second quarter of 2017. During the first quarter of 2019, the Company recorded a recovery of $0.2 million and during the second quarter of 2019, the Company recorded a recovery $1.7 million, related to a bad debt provision for the receivables due from this customer. This matter is considered fully resolved.

Property, Plant and Equipment, net

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, net

Property, plant and equipment consisted of the following:


	Useful Life (Years)	March 31, 2020		December 31, 2019

Land		$	2,656	$	2,672
Buildings and improvements	30-40	24,211		24,537
Office furniture and equipment	5-8	17,443		17,227
Machinery and equipment	5-7	225,230		225,974
		269,540		270,410
Accumulated depreciation and amortization		(174,569)		(171,803)
Property, plant and equipment, net		$	94,971	$	98,607

Depreciation and amortization expense for both the three months ended March 31, 2020 and 2019 was approximately $6.1 million.

Goodwill

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Changes in the carrying amount of goodwill by segment is shown below:


	Services		International		Products and Systems		Total
Balance at December 31, 2019	$	247,215	$	35,195	$	—	$	282,410
Goodwill acquired during the period	—		—		—		—
Impairment charges	(57,227)		(19,862)		—		(77,089)
Adjustments to preliminary purchase price allocations	—		—		—		—
Foreign currency translation	(8,002)		(1,030)		—		(9,032)
Balance at March 31, 2020	$	181,986	$	14,303	$	—	$	196,289

The Company reviews goodwill for impairment on a reporting unit basis on October 1 of each year and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable.

During the first quarter of 2020, the Company’s market capitalization declined significantly compared to the fourth quarter of 2019. The Company’s closing stock price was $4.26 on March 31, 2020. Over the same period, the equity value of the Company’s peer group, and the overall U.S. stock market also declined significantly amid market volatility. In addition, oil prices have dropped significantly. These declines were driven by the uncertainty surrounding the COVID-19 pandemic and other macroeconomic events such as the geopolitical tensions between OPEC and Russia. Based on these factors, the Company concluded that multiple triggering events occurred and, accordingly, an interim quantitative goodwill impairment test was performed for each reporting unit as of March 31, 2020 (“testing date”). The Company also performed an analysis to determine any impairment of long-lived assets (see Note 9–Intangible assets) as well based on the triggering events noted above.

In performing the interim quantitative goodwill impairment test and consistent with prior practice, the Company determined the fair value of each of the reporting units using a combination of the income approach and the market approach by assessing each of these valuation methodologies based upon availability and relevance of comparable company data and determining the appropriate weighting.

Under the income approach, the fair value for each of the reporting units was determined based on the present value of estimated future cash flows, discounted at an appropriate risk-adjusted rate. The Company used internal forecasts, updated for recent events, to estimate future cash flows with cash flows beyond the specific operating plans estimated using a terminal value calculation, which incorporates historical and forecasted trends, including an estimate of long-term future growth rates, based on the Company’s most recent views of the long-term outlook for each reporting unit. The internal forecasts include assumptions about future market recovery, including the expected demand for the Company’s goods and services. Due to the inherent uncertainties involved in making estimates and assumptions, actual results may differ from those assumed in the forecasts. The Company derived the discount rates using a capital asset pricing model and analyzing published rates for industries relevant to the reporting units to estimate the cost of equity financing. The Company used discount rates that are commensurate with the risks and uncertainties inherent in the respective businesses and in the internally developed forecasts, updated for recent events.

The market approach valuations were derived from metrics of publicly traded companies or historically completed transactions of comparable businesses. The selection of comparable businesses was based on the markets in which the reporting units operate considering risk profiles, size, geography, and diversity of products and services.

Based upon the results of the interim quantitative goodwill impairment test, the Company recorded an aggregate impairment charge of $77.1 million, which included $57.2 million in the services reporting unit within the Services segment, $19.3 million in the European reporting unit and $0.6 million in the Brazilian reporting unit, both within the International segment. The impairment was calculated based on the difference between the estimated fair value and the carrying value of the reporting units and are included in Impairment charges on the condensed consolidated statements of income (loss) for the three months ended March 31, 2020. Any significant adverse changes in future periods to the Company’s internal forecasts or the external market conditions, if any, could reasonably be expected to negatively affect its key assumptions and may result in future goodwill impairment charges which could be material.

The Company's cumulative goodwill impairment as of March 31, 2020 was $100.2 million, of which $57.2 million related to the Services segment, $29.8 million related to the International segment and $13.2 million related to the Products and Systems segment. The Company's cumulative goodwill impairment as of December 31, 2019 was $23.1 million, of which $13.2 million related to the Products and Systems segment and $9.9 million related to the International segment.

Intangible Assets

3 Months Ended

Mar. 31, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets

The gross amount, accumulated amortization and net carrying amount of intangible assets were as follows:


		March 31, 2020														December 31, 2019
	Useful Life (Years)	Gross Amount		Accumulated Amortization		Impairment		Net Carrying Amount		Gross Amount		Accumulated Amortization		Net Carrying Amount

Customer relationships	5-18	$	111,825	$	(68,262)	$	(2,206)	$	41,357	$	113,861	$	(67,853)	$	46,008
Software/Technology	3-15	73,493		(20,220)		(25,874)		27,399		77,914		(18,756)		59,158
Covenants not to compete	2-5	12,624		(11,662)		(212)		750		12,795		(11,630)		1,165
Other	2-12	10,768		(7,753)		(502)		2,513		10,813		(7,607)		3,206
Total		$	208,710	$	(107,897)	$	(28,794)	$	72,019	$	215,383	$	(105,846)	$	109,537

As described in Note 8–Goodwill, there were negative market indicators that were determined to be triggering events indicating a potential impairment of certain long-lived assets within asset groups in the Services, International, Products and Corporate segments. The asset groups are groupings of assets and liabilities determined at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. Recoverability testing indicated that certain intangible assets and right of use assets (See Note 13–Leases) were potentially impaired. For asset groups that required an impairment measurement, similar to the valuations performed to determine the goodwill impairment, the Company used income and market approaches to estimate the fair value of the long-lived assets, which requires significant judgment in evaluation of the useful lives of the assets, economic and industry trends, estimated future cash flows, discount rates, and other factors. The result of the analysis was an aggregate impairment charge of $28.8 million, which included $25.9 million to software/technology, $2.2 million to customer relationships, $0.5 million to other intangibles and $0.2 million to covenants not to compete, all of which are in the Services reporting unit within the Services segment and are included in Impairment charges on the condensed consolidated statements of income for the three months ended March 31, 2020.

Amortization expense for the three months ended March 31, 2020 and March 31, 2019 was approximately $3.4 million and $3.6 million, respectively.

Accrued Expenses and Other Current Liabilities

3 Months Ended

Mar. 31, 2020

Payables and Accruals [Abstract]

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:


	March 31, 2020		December 31, 2019

Accrued salaries, wages and related employee benefits	$	25,396	$	30,072
Contingent consideration, current portion	976		2,614
Accrued workers’ compensation and health benefits	5,333		4,467
Deferred revenue	6,153		5,860
Pension accrual	2,519		2,519
Right-of-use liability - operating	9,947		10,133
Other accrued expenses	24,832		25,724
Total	$	75,156	$	81,389

Long-Term Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt consisted of the following:


	March 31, 2020		December 31, 2019

Senior credit facility	$	156,600	$	151,773
Senior secured term loan, net of debt issuance costs of $0.1 million	93,674		94,919

Other	7,752		8,021
Total debt	258,026		254,713
Less: Current portion	(7,240)		(6,593)
Long-term debt, net of current portion	$	250,786	$	248,120

Senior Credit Facility

The Company's revolving credit agreement with its banking group ("Credit Agreement") provides the Company with a $300 million revolving line of credit. In addition, the Credit Agreement provides the Company with a $100 million senior secured term loan A facility. Both the revolving line of credit and the term loan A facility under the Credit Agreement have a maturity date of December 12, 2023. The Company may borrow up to $100 million in non-U.S. Dollar currencies and use up to $20 million of the credit limit for the issuance of letters of credit. As of March 31, 2020, the Company had borrowings of $250.3 million and a total of $3.7 million of letters of credit outstanding under the Credit Agreement. The Company has capitalized costs associated with debt modifications of $1.3 million as of March 31, 2020, which is included in Other assets on the Condensed Consolidated Balance Sheets.

Loans under the Credit Agreement bear interest at the London Interbank Offered Rate ("LIBOR") plus an applicable LIBOR margin ranging from 1% to 2.25%, or a base rate less a margin of 1.25% to 0.375%, at the option of the Company, based upon the Company’s Funded Debt Leverage Ratio. Funded Debt Leverage Ratio is generally the ratio of (1) all outstanding indebtedness for borrowed money and other interest-bearing indebtedness as of the date of determination to (2) EBITDA (which is (a) net income, less (b) income (or plus loss) from discontinued operations and extraordinary items, plus (c) income tax expenses, plus (d) interest expense, plus (e) depreciation, depletion, and amortization (including non-cash loss on retirement of assets), plus (f) stock compensation expense, less (g) cash expense related to stock compensation, plus (h) certain amounts of EBITDA of acquired business for the prior twelve months, plus (i) certain expenses related to the closing of the Credit Agreement, plus (j) non-cash expenses which do not (in the current or any future period) represent a cash item (excluding non-cash gains which increase net income), plus (k) non-recurring charges (not to exceed $10.0 million in the four consecutive quarters immediately preceding the date of determination) for items such as severance, lease termination charges, asset write-offs and litigation settlements paid, and multi-employer pension plan withdrawal liabilities, all determined for the period of four consecutive fiscal quarters immediately preceding the date of determination of EBITDA. The Company has the benefit of the lowest margin if its Funded Debt Leverage Ratio is equal to or less than 1.0 to 1, and the margin increases as the ratio increases, to the maximum margin if the ratio is greater than 3.75 to 1. The Company will also bear additional costs for market disruption, regulatory changes effecting the lenders’ funding costs, and default pricing of an additional 2% interest rate margin on any amounts not paid when due. Amounts borrowed under the Credit Agreement are secured by liens on substantially all of the assets of the Company and is guaranteed by certain of its subsidiaries.

The Credit Agreement contains financial covenants requiring that the Company maintain a Funded Debt Leverage Ratio of no greater than 4.25 to 1 through December 31, 2018, reducing to a maximum permitted ratio of 4.0 to 1 as of March 31, 2019 through June 30, 2020, a maximum permitted ratio of 3.75 to 1 as of September 30, 2020 and a maximum permitted ratio of 3.50 to 1 as of December 31, 2020 and all quarterly periods thereafter, and a Fixed Charge Coverage Ratio of at least 1.25 to 1. Fixed Charge Coverage Ratio means the ratio, as of any date of determination, of (a) (i) EBITDA for the 12 month period immediately preceding the date of determination, taken together as one accounting period, less (ii) the aggregate amount of all capital expenditures made during the period, less (iii) taxes paid in cash during the period, less (iv) Restricted Payments (as defined in the Credit Agreement) paid in cash during the period, -to- (b) the sum of (i) all interest, premium payments, debt discount, fees, charges and related expenses of the Company and its subsidiaries in connection with borrowed money (including capitalized interest) or in connection with the deferred purchase price of assets, in each case, to the extent treated as interest in accordance with U.S. generally accepted accounting principles ("GAAP") and to the extent paid in cash during the period, (ii) the aggregate principal amount of all redemptions or similar acquisitions for value of outstanding debt for borrowed money or

regularly scheduled principal payments made during the period, but excluding any such payments to the extent refinanced through the incurrence of additional Indebtedness otherwise expressly permitted under the Credit Agreement, and (iii) payments made during the period under all leases that have been or should be, in accordance with GAAP as in effect for the Company's 2017 audited financial statement, recorded as capitalized leases. The Company can elect to increase the maximum Funded Debt Leverage Ratio to 4.0 to 1 for four fiscal quarters immediately following the fiscal quarter in which the Company acquires another business, with the maximum permitted ratio reducing back to 3.5 to 1 in the fifth fiscal quarter following such acquisition. The Company can make this election twice during the term of the Credit Agreement, but prior to the first time the Company makes an election to increase the Funded Debt Leverage Ratio to 4.0 to 1 in connection with an acquisition, the Company must obtain the consent of lenders (in their sole discretion) holding at least 66-2/3% of the credit exposure under the Credit Agreement.

The Credit Agreement also limits the Company’s ability to, among other things, create liens, make investments, incur more indebtedness, merge or consolidate, make dispositions of property, pay dividends and make distributions to stockholders or repurchase its stock, enter into a new line of business, enter into transactions with affiliates and enter into burdensome agreements. The Credit Agreement does not limit the Company’s ability to acquire other businesses or companies except that for acquisitions completed prior to April 1, 2021, (a) the aggregate consideration for all acquisitions made on or after March 9, 2020 and prior to April 1, 2021 cannot exceed $5.0 million, and (b) prior to the first of any such acquisition, the Company must have demonstrated a Funded Debt Leverage Ratio of not greater than 3.0 to 1.0 for two consecutive fiscal quarters immediately prior to such acquisition. The acquired business or company must be in the Company's line of business and, if the acquired business is a separate subsidiary, in certain circumstances the lenders will receive the benefit of a guaranty of the subsidiary and liens on its assets and a pledge of its stock.

As of March 31, 2020, the Company was in compliance with the terms of the Credit Agreement and will continuously monitor its compliance with the covenants contained in its Credit Agreement.

Subsequent Event

On May 15, 2020, the Company entered into the Third Amendment (the “Amendment”), dated May 15, 2020, to the Credit Agreement, dated December 13, 2018, with its banking group under the Credit Agreement. Due to the uncertain impact of the COVID-19 pandemic and the significant drop in oil prices, the Company determined that it would not meet the financial covenants in the Credit Agreement for upcoming quarters. Accordingly, the Amendment modifies the financial covenants to provide for: i) elimination of the Funded Debt Leverage Ratio (as defined in the Credit Agreement) for the quarters ended June 30 and September 30, 2020 and increases the Funded Debt Leverage ratio to no greater than 5.25 to 1 beginning for the quarter ending December 31, 2020 and decreasing each successive quarter to no greater than 3.50 to 1 for the quarter ended September 30, 2021, and all quarterly periods thereafter; ii) an elimination of the minimum Fixed Charge Coverage Ratio (as defined in the Credit Agreement), a decrease to 1.0 to 1 for the quarter ending March 31, 2021 and returning to 1.25 to 1 for the quarter ending June 30, 2021 and thereafter; iii) the addition of a minimum EBITDA covenant requiring $3.44 million for the three months ending June 30, 2020, $24.25 million for the six months ending September 30, 2020, and $38.55 million for the nine months ending December 31, 2020, with no requirement thereafter; and iv) the addition of a minimum Liquidity (as defined in the Amendment) covenant of not less than $20.0 million at all times through September 30, 2020 and ceasing thereafter. In addition, the Amendment reduced the revolving line of credit to $175.0 million, set a LIBOR floor of 1.0% applicable to all LIBOR loans, and increased the LIBOR margin range to 1.50% to 4.15%, in addition to certain other modifications of the Credit Agreement. The Amendment also requires that the Company promptly prepay the outstanding amount under the revolving credit facility in an amount equal to the difference between (a) the aggregate sum of cash and cash equivalents of the Company and its subsidiaries held in the United States minus (b) $10.0 million if, for a period of two (2) consecutive business days, (i) the outstanding amount under the revolving credit facility exceeds $75.0 million and (ii) the such cash and cash equivalents exceeds $10.0 million.

The Amendment also provides that the Company may not make any acquisitions prior to June 30, 2021, and thereafter only if the Company's Funded Debt Leverage Ratio is less than 2.50 to 1 and after giving effect to such acquisition, its pro forma Funded Debt Leverage Ratio will not be greater than 3.25 to 1.

The Company believes that it is probable, based on the amended covenants, that the Company will be able to comply with the

financial covenants in the Credit Agreement as modified by the Amendment and that sufficient credit remains available under the Credit Agreement to meet the Company's liquidity needs. However, due to the uncertainties being caused by the COVID-19 pandemic and the significant drop in oil prices, such matters cannot be predicted with certainty.

Other debt

The Company's other debt includes local bank financing provided at the local subsidiary level used to support working capital requirements and fund capital expenditures. At March 31, 2020, there was an aggregate of approximately $7.8 million outstanding, payable at various times through 2029. Monthly payments range from $1 thousand to $17 thousand and interest rates range from 0.4% to 3.5%.

Fair Value Measurements

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

The Company performs fair value measurements in accordance with the guidance provided by ASC 820, Fair Value Measurements and Disclosures. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.

Financial instruments measured at fair value on a recurring basis

The fair value of contingent consideration liabilities was estimated using a discounted cash flow technique with significant inputs that are not observable in the market and thus represents a Level 3 fair value measurement as defined in ASC 820. The significant inputs in the Level 3 measurement not supported by market activity include the probability assessments of expected future cash flows related to the acquisitions, appropriately discounted considering the uncertainties associated with the obligation, and as calculated in accordance with the terms of the applicable acquisition agreements.

The following table represents the changes in the fair value of Level 3 contingent consideration:


	Three months ended March 31,
	2020		2019
Beginning balance	$	3,216	$	2,365

Payments	(1,303)		—
Accretion of liability	11		44
Revaluation	(553)		261
Foreign currency translation	(62)		29
Ending balance	$	1,309	$	2,699

Financial instruments not measured at fair value on a recurring basis

The Company has evaluated current market conditions and borrower credit quality and has determined that the carrying value of its long-term debt approximates fair value. The fair value of the Company’s notes payable and capital lease obligations approximates their carrying amounts based on anticipated interest rates which management believes would currently be available to the Company for similar issuances of debt.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Leases

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Leases

The Company leases certain office and operating facilities, machinery, equipment, and vehicles. Concurrent with the adoption of ASC 842, the Company recognized a right-of-use (ROU) asset and lease liability based on the present value of the future lease payments over the lease term for each lease agreement. The Company has elected not to recognize a ROU asset and lease liability for leases with terms of 12 months or less and will continue to recognize lease expense for these leases on a straight-line basis over the lease term. The Company has leases with both lease components and non-lease components, such as common area maintenance, utilities, or other repairs and maintenance. For all asset classes, the Company decided to utilize the practical expedient to include both fixed lease components and fixed non-lease components in calculating the ROU asset and lease liability. The Company identified variable lease payments, such as maintenance payments based on actual activities performed or costs incurred, at lease commencement by assessing the nature of the payment provisions, including whether the payments are subject to a minimum charge. Many of the Company's leases include one or more options to renew. When it is reasonably certain that the Company will exercise the option, the Company will include the impact of the option in the lease term for purposes of determining future lease payments. As the Company is unable to determine the discount rate implicit in its lease agreements, the Company uses its incremental borrowing rate on the commencement date to calculate the present value of future payments.

The Company’s Condensed Consolidated Balance Sheets includes the following related to operating leases:


Leases	Classification	March 31, 2020		December 31, 2019
Assets
ROU assets	Other Assets	$	44,669	$	45,817

Liabilities
ROU - current	Accrued and other current liabilities	$	9,947	$	10,133
ROU liability - long-term	Other liabilities	35,927		36,750
Total ROU liabilities		$	45,874	$	46,883

Included within the balance of operating leases is a lease for the Company’s headquarters which is with a related party. The ROU liability for this facility was approximately $4.3 million and $4.5 million as of March 31, 2020 and December 31, 2019, respectively. Total rent payments for this facility were approximately $0.3 million and $0.2 million for the three months ended March 31, 2020 and March 31, 2019, respectively.

The total ROU assets attributable to finance leases were approximately $17.9 million and $19.2 million as of March 31, 2020 and December 31, 2019, respectively, which is included in Property, plant, and equipment, net on the Condensed Consolidated Balance Sheets.

As described in Note 9–Intangible Assets, the Company performed an analysis to determine whether there was any impairment of long-lived assets, which included the ROU assets, within the Services, International, and Products and Systems operating segments as well as Corporate. The result of the analysis was a $0.2 million impairment of a ROU asset in an asset group within the Services segment which is included in Impairment charges on the condensed consolidated statements of income (loss) for the three months ended March 31, 2020.

The components of lease costs were as follows:


		Three months ended
	Classification	March 31, 2020		March 31, 2019
Finance lease expense
Amortization of ROU assets	Depreciation and amortization	$	1,228	$	1,292
Interest on lease liabilities	Interest expense	218		197
Operating lease expense	Cost of revenue; Selling, general & administrative expenses	3,528		3,023
Short-term lease expense	Cost of revenue; Selling, general & administrative expenses	1		133
Variable lease expense	Cost of revenue; Selling, general & administrative expenses	349		272
Total		$	5,324	$	4,917

Additional information related to leases was as follows:


	Three months ended
	March 31, 2020			March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities for finance leases
Finance - financing cash flows	$	1,167		$	1,249
Finance - operating cash flows	$	217		$	197
Operating - operating cash flows	$	3,291		$	3,079
ROU assets obtained in the exchange for lease liabilities
Finance leases	$	667		$	1,086
Operating leases	$	1,625		$	1,348
Weighted-average remaining lease term (in years)
Finance leases	5.9			5.8
Operating leases	6.1			6.0
Weighted-average discount rate
Finance leases	5.6		%	6.5		%
Operating leases	5.8		%	6.0		%

Maturities of lease liabilities as of March 31, 2020 were as follows:


	Finance		Operating
Remainder of 2020	$	4,762	$	9,348
2021	4,345		10,558
2022	3,489		8,472
2023	2,618		7,038
2024	1,708		5,478
Thereafter	917		13,729
Total	17,839		54,623
Less: Present value discount	(1,591)		(8,749)
Lease liability	$	16,248	$	45,874

Leases

The Company’s Condensed Consolidated Balance Sheets includes the following related to operating leases:


Leases	Classification	March 31, 2020		December 31, 2019
Assets
ROU assets	Other Assets	$	44,669	$	45,817

Liabilities
ROU - current	Accrued and other current liabilities	$	9,947	$	10,133
ROU liability - long-term	Other liabilities	35,927		36,750
Total ROU liabilities		$	45,874	$	46,883

The components of lease costs were as follows:


		Three months ended
	Classification	March 31, 2020		March 31, 2019
Finance lease expense
Amortization of ROU assets	Depreciation and amortization	$	1,228	$	1,292
Interest on lease liabilities	Interest expense	218		197
Operating lease expense	Cost of revenue; Selling, general & administrative expenses	3,528		3,023
Short-term lease expense	Cost of revenue; Selling, general & administrative expenses	1		133
Variable lease expense	Cost of revenue; Selling, general & administrative expenses	349		272
Total		$	5,324	$	4,917

Additional information related to leases was as follows:


	Three months ended
	March 31, 2020			March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities for finance leases
Finance - financing cash flows	$	1,167		$	1,249
Finance - operating cash flows	$	217		$	197
Operating - operating cash flows	$	3,291		$	3,079
ROU assets obtained in the exchange for lease liabilities
Finance leases	$	667		$	1,086
Operating leases	$	1,625		$	1,348
Weighted-average remaining lease term (in years)
Finance leases	5.9			5.8
Operating leases	6.1			6.0
Weighted-average discount rate
Finance leases	5.6		%	6.5		%
Operating leases	5.8		%	6.0		%

Maturities of lease liabilities as of March 31, 2020 were as follows:


	Finance		Operating
Remainder of 2020	$	4,762	$	9,348
2021	4,345		10,558
2022	3,489		8,472
2023	2,618		7,038
2024	1,708		5,478
Thereafter	917		13,729
Total	17,839		54,623
Less: Present value discount	(1,591)		(8,749)
Lease liability	$	16,248	$	45,874

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings and Government Investigations The Company is subject to periodic lawsuits, investigations and claims that arise in the ordinary course of business. The Company cannot predict with certainty the ultimate resolution of lawsuits, investigations and claims asserted against it. Except possibly for certain of the matters described below, the Company does not believe that any currently pending legal proceeding to which the Company is a party will have a material adverse effect on its business, results of operations, cash flows or financial condition. The costs of defense and amounts that may be recovered against the Company may be covered by insurance for certain matters. Litigation and Commercial Claims The Company was contracted to perform inspections of welds on various pipeline projects in Texas for a customer. As of March 31, 2020, approximately $1.4 million of past due receivables were outstanding from this customer. The customer provided the Company with notice in December 2019, alleging that the Company’s inspection of 66 welds (out of approximately 16,000 welds inspected) were not in compliance with the contract, claimed approximately $7.6 million in damages, and requested that the Company pay these damages and any other damages incurred. The Company has filed a lawsuit in the District Court of Bexar County, Texas, 37th Judicial District, in an action captioned Mistras Group, Inc. v. Epic Y-Grade Pipeline LP, to recover the $1.4 million and other amounts due to the Company. The customer filed a counterclaim, alleging breach of contract and seeking recovery of its alleged damages. The Company believes that any successful claim by the customer regarding the Company’s workmanship will be covered by insurance, subject to payment of a deductible. At this time, the Company is unable to determine whether it has any liability in connection with this matter and if so, the amount or range of any such liability, and accordingly, has not established any accruals for this matter. Pension Related Contingencies The workforce of certain of the Company’s subsidiaries are unionized and the terms of employment for these workers are governed by collective bargaining agreements, or CBAs. Under these CBAs, the Company’s subsidiaries are required to contribute to the national pension funds for the unions representing these employees, which are multi-employer pension plans. The Company was notified that a significant project was awarded to another contractor in January 2018, and as a result, one of the Company’s subsidiaries experienced a significant reduction in the number of its employees covered by one of the CBAs. Under certain circumstances, such a reduction in the number of employees participating in multi-employer pension plans pursuant to this CBA could result in a complete or partial withdrawal liability to these multi-employer pension plans under the Employee Retirement Income Security Act of 1974 ("ERISA"). Management explored options to retain a level of union work that would avoid withdrawal liability to the pension plans, but concluded during the third quarter of 2018 that the Company's subsidiaries probably would not obtain sufficient union work to avoid withdrawal liability. Therefore, the Company determined that it is probable that its subsidiary would incur a withdrawal liability related to these multi-employer pension plans. Accordingly, the Company recorded a charge of $5.9 million during 2018 and $0.8 million during 2019 for this potential withdrawal liability. The Company’s subsidiary reached an agreement with one of the pension funds in September 2019 and made a final payment of $0.9 million in complete satisfaction of the withdrawal liability of the subsidiary. Excluding the settlement payment, the Company made monthly payments totaling $3.3 million through the time of the final settlement payment, for total payments of $4.2 million. The balance of the estimated total amount of this potential liability as of March 31, 2020 is approximately $2.5 million. Severance and labor disputes The Company’s German subsidiary provides employees to customers under temporary staff leasing arrangements. In April 2017, the German Labor Lease Act was passed in Germany limiting the duration of temporary workers to eighteen months, or longer as subsequently agreed with by a customer appropriate authority. Since the passing of the German Labor Lease Act, the Company explored selling its staff leasing services and concluded during the third quarter of 2018 that a sale would not be probable. As a result, the Company decided that it would not renew several of these leasing services contracts when they expired beginning in 2019. Due to the limit on the length of service allowed under the German Labor Lease Act, employees are being transitioned off the customer contracts. The German subsidiary has terminated, or will terminate, some these employees, creating a severance obligation to the terminated employees, and has transitioned, or will transition other employees to the Company's other customers. During December 2019, the Company executed an agreement to sell the rights of certain customer contracts for total consideration of approximately $0.1 million, effective January 1, 2020. No other assets or liabilities other than those employee benefits related to employees working on the customer contracts were included in the sale. As of March 31, 2020, the Company has approximately $0.6 million of accrued estimated severance payment obligations, which takes into account the Company's estimate with respect to the employees that have been or will be transitioned to the German subsidiaries' other customers. The $0.6 million of estimated obligations is net of $0.3 million in payments and $0.6 million in reversals due to employees being transitioned to customer contracts. Acquisition and disposition related contingencies The Company is liable for contingent consideration in connection with certain of its acquisitions. As of March 31, 2020, total potential acquisition-related contingent consideration ranged from zero to approximately $5.7 million and would be payable upon the achievement of specific performance metrics by certain of the acquired companies over the next 2.42 years. During 2018, the Company sold a subsidiary in the Products and Systems segment. As part of the sale, the Company entered into a three-year agreement to purchase products from the buyer, with a cumulative commitment of $2.3 million, of which $1.4 million is remaining as of March 31, 2020. The agreement is based on third-party pricing and the Company's planned purchase requirements over the three year purchase period to meet the minimum contractual purchases.

Segment Disclosure

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Segment Disclosure

The Company’s three operating segments are:

•Services. This segment provides asset protection solutions predominantly in North America, with the largest concentration in the United States, followed by Canada, consisting primarily of NDT, inspection, mechanical and engineering services that are used to evaluate the safety, structural integrity and reliability of critical energy, industrial and public infrastructure and commercial aerospace components. PCMS software and pipeline related software and data analysis solutions are included in this segment.

•International. This segment offers services, products and systems similar to those of the other segments to select markets within Europe, the Middle East, Africa, Asia and South America, but not to customers in China and South Korea, which are served by the Products and Systems segment.

•Products and Systems. This segment designs, manufactures, sells, installs and services the Company’s asset protection products and systems, including equipment and instrumentation, predominantly in the United States.

Costs incurred for general corporate services, including finance, legal, and certain other costs that are provided to the segments are reported within Corporate and eliminations. Sales to the International segment from the Products and Systems segment and subsequent sales by the International segment of the same items are recorded and reflected in the operating performance of both segments. Additionally, engineering charges and royalty fees charged to the Services and International segments by the Products and Systems segment are reflected in the operating performance of each segment. All such intersegment transactions are eliminated in the Company’s consolidated financial reporting.

Selected consolidated financial information by segment for the periods shown was as follows: (with intercompany transactions eliminated in Corporate and eliminations)


	Three months ended
	March 31, 2020		March 31, 2019
Revenues
Services	$	128,873	$	140,298
International	29,067		35,162
Products and Systems	2,812		3,432
Corporate and eliminations	(1,287)		(2,105)
	$	159,465	$	176,787


	Three months ended
	March 31, 2020		March 31, 2019
Gross profit
Services	$	32,237	$	37,365
International	8,023		10,360
Products and Systems	368		1,239
Corporate and eliminations	16		(90)
	$	40,644	$	48,874


	Three months ended
	March 31, 2020		March 31, 2019
Income (loss) from operations
Services	$	(81,494)	$	4,053
International	(20,419)		(215)
Products and Systems	(1,680)		(1,328)
Corporate and eliminations	(7,635)		(6,906)
	$	(111,228)	$	(4,396)

Income (loss) from operations by operating segment includes intercompany transactions, which are eliminated in Corporate and eliminations.


	Three months ended
	March 31, 2020		March 31, 2019
Depreciation and amortization
Services	$	7,075	$	7,268
International	2,140		2,089
Products and Systems	253		290
Corporate and eliminations	(1)		21
	$	9,467	$	9,668


	March 31, 2020		December 31, 2019
Intangible assets, net
Services	$	61,536	$	98,284
International	9,157		9,814
Products and Systems	1,104		1,181
Corporate and eliminations	222		258
	$	72,019	$	109,537


	March 31, 2020		December 31, 2019
Total assets
Services	$	427,165	$	537,518
International	125,684		153,380
Products and Systems	16,003		16,028
Corporate and eliminations	14,693		12,952
	$	583,545	$	719,878

Refer to Note 2–Revenue, for revenues by geographic area for the three months ended March 31, 2020 and March 31, 2019.

Description of Business and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements contained in this report are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results for the interim periods of the years ending December 31, 2020 and December 31, 2019. Certain items included in these statements are based on management’s estimates. Actual results may differ from those estimates. The results of operations for any interim period are not necessarily indicative of the results expected for the year. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the notes to the audited consolidated financial statements contained in the 2019 Annual Report.
Principles of Consolidation	Principles of Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Mistras Group, Inc. and its wholly and majority-owned subsidiaries. For subsidiaries in which the Company’s ownership interest is less than 100%, the non-controlling interests are reported in stockholders’ equity in the accompanying Condensed Consolidated Balance Sheets. The non-controlling interests in net results, net of tax, is classified separately in the accompanying Unaudited Condensed Consolidated Statements of Income (Loss). All significant intercompany accounts and transactions have been eliminated in consolidation.
Reclassification	Reclassification Certain amounts in prior periods have been reclassified to conform to the current year presentation. Such reclassifications did not have a material effect on the Company's financial condition or results of operations as previously reported.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax credit carry-forwards. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is provided if it is more likely than not that some or all of a deferred income tax asset will not be realized. Financial accounting standards prescribe a minimum recognition threshold a tax position is required to meet before being recognized in the financial statements. These standards also provide guidance on de-recognition, measurement, and classification of amounts relating to uncertain tax positions, accounting for and disclosure of interest and penalties, accounting in interim periods and disclosures required. Interest and penalties related to unrecognized tax positions are recognized as incurred within “provision for income taxes” in the consolidated statements of income. ASC 740-270, Income Taxes-Interim Reporting, requires the Company to use an estimated annual effective tax rate (EAETR) for calculating its tax provision for interim periods. At each interim period, the Company is required, with certain exceptions and limitations, to estimate its forecasted worldwide EAETR, which is applied to the Company's year-to-date consolidated ordinary income or loss resulting in the year-to-date income tax provision before considering items not included in ordinary income or loss. The tax effects of events or transactions not considered to represent ordinary income or loss are accounted for discretely in the interim period and are not included in the determination of the EAETR. In response to the COVID-19 pandemic, the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was signed into law on March 27, 2020. The CARES Act, among other things, includes tax provisions relating to deferment of employer’s social security payments, net operating loss utilization and carryback periods, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property (QIP). The ultimate impact of the CARES Act may differ from the estimated impact the Company recorded during this interim period due to changes in interpretations and guidance that may be issued and actions the Company may take in response to the CARES Act. The Company will continue to assess the impact that various provisions will have on its business. The Company continues to evaluate its deferred tax assets each period to determine if a valuation allowance is required based on whether it is more likely than not that some portion of these deferred tax assets will not be realized. As of March 31, 2020, management concluded that it is more likely than not that a substantial portion of the Company's deferred tax assets will be realized. As part of the Company's analysis, it considered both positive and negative factors that impact profitability and whether those factors would lead to a change in the estimate of the Company's deferred tax assets that may be realized in the future. In the current period, the Company began to see impacts on its business as a result of the COVID-19 pandemic. The Company will continue to monitor the impacts of the COVID-19 pandemic on its business, and any sustained or prolonged reductions in future earnings periods may change the Company's conclusions on whether it is more likely than not to realize portions of the Company's deferred tax assets. The Company’s effective income tax rate was approximately 14% and 33% for the three months ended March 31, 2020 and 2019, respectively. The effective income tax rate for the three months ended March 31, 2020 was lower than the statutory rate primarily due to impairments recorded during the interim period for which no income tax benefits will be realized by us. However, this unfavorable impact on the Company's effective income tax rate was partially offset by income tax benefits of the CARES Act. The CARES Act provides a five-year carryback of net operating losses generated in years 2018-2020. As the statutory federal income tax rate applicable to certain years within the carryback period is 35%, carryback to those years of the Company's estimated 2020 annual tax loss provides a tax benefit in excess of the current federal statutory rate of 21%, resulting in an increased income tax benefit. The Company projects that the income tax effects of the CARES Act will result in additional income tax benefit recognized throughout the 2020 tax year as part of the estimated annual effective tax rate, and a cash refund in 2021 of taxes paid in prior years. The effective income tax rate for the three months ended March 31, 2019 was higher than the statutory rate due to the impact of discrete items, the global intangible low-taxes income (GILTI), and executive compensation, and other provisions resulting from the December 22, 2017 passage of the Tax Cuts and Jobs Act and foreign tax rates different than statutory rates in the U.S
Recent Accounting Pronouncements	Recent Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of deferred tax liabilities related to outside basis differences. The standard is effective for interim and annual periods beginning January 1, 2021, with certain amendments applied prospectively and others requiring retrospective application. Early adoption is permitted, with any adjustments reflected as of the beginning of the fiscal year of adoption. If early adoption is elected, all changes as a result of the standard must be adopted in the same period. The Company is currently evaluating the impact of this guidance on its consolidated financial position, results of operations, and cash flows. In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The guidance provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another rate that is expected to be discontinued. The amendments in ASU 2020-04 are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of this guidance on its consolidated financial position, results of operations, and cash flows.
Revenue	Revenue The majority of the Company's revenues are derived from providing services on a time and material basis and are short-term in nature. The Company accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is the unit of account in ASC Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company's contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and is, therefore, not distinct. The Company provides highly integrated and bundled inspection services to its customers. Some of the Company's contracts have multiple performance obligations, most commonly due to the contract providing both goods and services. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using its best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is a relative selling price based on price lists. Contract modifications are not routine in the performance of the Company contracts. Generally, when contracts are modified, the modification is to account for changes in scope to the goods and services that are provided. In most instances, contract modifications are for goods or services that are distinct, and, therefore, are accounted for as a separate contract. The Company's performance obligations are satisfied over time as work progresses or at a point in time. The majority of the Company's revenue recognized over time as work progresses is related to its service deliverables, which includes providing testing, inspection and mechanical services to the Company's customers. Revenue is recognized over time based on time and material incurred to date which best portrays the transfer of control to the customer. The Company also utilizes an available practical expedient that provides for revenue to be recognized in an amount that corresponds directly with the value to the customer of the entity’s performance completed to date. Fixed fee arrangements are determined based on expected labor, material, and overhead to be consumed on fulfillment of such services. Revenue is recognized on a cost-to-cost method tracked on an input basis. The majority of the Company's revenue recognized at a point in time is related to product sales when the customer obtains control of the asset, which is generally upon shipment to the customer. Contract costs include labor, material and overhead. The Company expects any significant remaining performance obligations to be satisfied within one year. Contract Estimates The majority of the Company's revenues are short-term in nature. The Company has many master service agreements (MSAs) that specify an overall framework and contract terms when the Company and customers agree upon services or products to be provided. The actual contracting to provide services or furnish products is triggered by a work order, purchase order, or some similar document issued pursuant to a MSA which sets forth the scope of services and/or identifies the products to be provided. From time-to-time, the Company may enter into long-term contracts, which can range from several months to several years. Revenue on such long-term contracts is recognized as work is performed based on total costs incurred to date in relation to the total estimated costs for the performance of the contract at completion. This includes contract estimates of costs to be incurred for the performance of the contract. Cost estimation is based upon the professional knowledge and experience of the Company's project managers, engineers and financial professionals. Factors that are considered in estimating the work to be completed include the availability of materials, the effect of any delays in the Company's project performance and the recoverability of any claims. Whenever revisions of estimates, contract costs and/or contract values indicate that the contract costs will exceed estimated revenues, thus creating a loss, a provision for the total estimated loss is recorded in that period. Contract Balances The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and customer advances and deposits (contract liabilities) on the Condensed Consolidated Balance Sheets. Amounts are generally billed as work progresses in accordance with agreed-upon contractual terms, generally at periodic intervals (e.g., weekly, bi-weekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, the Company sometimes receives advances or deposits from its customers before revenue is recognized, resulting in contract liabilities. These assets and liabilities are aggregated on an individual contract basis and reported on the Condensed Consolidated Balance Sheets at the end of each reporting period within accounts receivables or accrued expenses and other current liabilities.
Fair Value Measurements	Fair Value Measurements The Company performs fair value measurements in accordance with the guidance provided by ASC 820, Fair Value Measurements and Disclosures. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial instruments measured at fair value on a recurring basis The fair value of contingent consideration liabilities was estimated using a discounted cash flow technique with significant inputs that are not observable in the market and thus represents a Level 3 fair value measurement as defined in ASC 820. The significant inputs in the Level 3 measurement not supported by market activity include the probability assessments of expected future cash flows related to the acquisitions, appropriately discounted considering the uncertainties associated with the obligation, and as calculated in accordance with the terms of the applicable acquisition agreements. Financial instruments not measured at fair value on a recurring basis The Company has evaluated current market conditions and borrower credit quality and has determined that the carrying value of its long-term debt approximates fair value. The fair value of the Company’s notes payable and capital lease obligations approximates their carrying amounts based on anticipated interest rates which management believes would currently be available to the Company for similar issuances of debt.
Leases	LeasesThe Company leases certain office and operating facilities, machinery, equipment, and vehicles. Concurrent with the adoption of ASC 842, the Company recognized a right-of-use (ROU) asset and lease liability based on the present value of the future lease payments over the lease term for each lease agreement. The Company has elected not to recognize a ROU asset and lease liability for leases with terms of 12 months or less and will continue to recognize lease expense for these leases on a straight-line basis over the lease term. The Company has leases with both lease components and non-lease components, such as common area maintenance, utilities, or other repairs and maintenance. For all asset classes, the Company decided to utilize the practical expedient to include both fixed lease components and fixed non-lease components in calculating the ROU asset and lease liability. The Company identified variable lease payments, such as maintenance payments based on actual activities performed or costs incurred, at lease commencement by assessing the nature of the payment provisions, including whether the payments are subject to a minimum charge. Many of the Company's leases include one or more options to renew. When it is reasonably certain that the Company will exercise the option, the Company will include the impact of the option in the lease term for purposes of determining future lease payments. As the Company is unable to determine the discount rate implicit in its lease agreements, the Company uses its incremental borrowing rate on the commencement date to calculate the present value of future payments.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References

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+ Details

Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregated Revenues by Industry and Key Geographic Location

The following series of tables present the Company's disaggregated revenues:

Revenue by industry was as follows:


Three Months Ended March 31, 2020	Services		International		Products		Corp/Elim		Total
Oil & Gas	$	83,299	$	9,104	$	95	$	—	$	92,498
Aerospace & Defense	14,652		7,415		147		—		22,214
Industrials	12,867		4,919		488		—		18,274
Power generation & Transmission	5,095		1,697		854		—		7,646
Other Process Industries	6,004		2,120		3		—		8,127
Infrastructure, Research & Engineering	4,517		2,461		560		—		7,538
Other	2,439		1,351		665		(1,287)		3,168
Total	$	128,873	$	29,067	$	2,812	$	(1,287)	$	159,465


Three Months Ended March 31, 2019	Services		International		Products		Corp/Elim		Total
Oil & Gas	$	91,666	$	9,704	$	15	$	—	$	101,385
Aerospace & Defense	12,794		11,654		307		—		24,755
Industrials	16,123		5,075		432		—		21,630
Power generation & Transmission	6,262		1,422		1,380		—		9,064
Other Process Industries	6,319		2,242		5		—		8,566
Infrastructure, Research & Engineering	2,590		2,733		847		—		6,170
Other	4,544		2,332		446		(2,105)		5,217
Total	$	140,298	$	35,162	$	3,432	$	(2,105)	$	176,787

Revenue per key geographic location was as follows:


Three Months Ended March 31, 2020	Services		International		Products		Corp/Elim		Total
United States	$	109,581	$	154	$	1,559	$	(711)	$	110,583
Other Americas	18,735		1,505		278		(153)		20,365
Europe	108		26,235		340		(379)		26,304
Asia-Pacific	449		1,173		635		(44)		2,213
Total	$	128,873	$	29,067	$	2,812	$	(1,287)	$	159,465


Three Months Ended March 31, 2019	Services		International		Products		Corp/Elim		Total
United States	$	113,136	$	276	$	1,970	$	(1,282)	$	114,100
Other Americas	26,708		2,229		66		(56)		28,947
Europe	428		31,540		421		(763)		31,626
Asia-Pacific	26		1,117		975		(4)		2,114
Total	$	140,298	$	35,162	$	3,432	$	(2,105)	$	176,787

Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table sets forth a summary of the stock option activity, weighted-average exercise prices and options outstanding as of March 31, 2020 and March 31, 2019:


	Three months ended March 31,
	2020				2019
	Common Stock Options	Weighted Average Exercise Price		Common Stock Options	Weighted Average Exercise Price
Outstanding at beginning of period:	5	$	22.35	2,105	$	13.47
Granted	—	$	—	—	$	—
Exercised	—	$	—	(4)	$	10.00
Expired or forfeited	—	$	—	—	$	—
Outstanding at end of period:	5	$	22.35	2,101	$	13.47

Schedule of Vesting Activity of Restricted Stock Unit Awards

A summary of the vesting activity of restricted stock unit awards, with the respective fair value of the awards, is as follows:


	Three months ended March 31,
	2020		2019
Restricted stock awards vested	120		50
Fair value of awards vested	$	454	$	693

Schedule of Fully-vested Common Stock Issued to Non-employee Directors

A summary of the fully-vested common stock the Company issued to its six non-employee directors, in connection with its non-employee director compensation plan, is as follows:


	Three months ended March 31,
	2020		2019
Awards issued	—		14
Grant date fair value of awards issued	$	—	$	200

Schedule of Company's Outstanding, Nonvested Restricted Share Units and Performance Restricted Stock Units

A summary of the Company's outstanding, non-vested restricted share units is as follows:


	Three months ended March 31,
	2020				2019
	Units	Weighted Average Grant-Date Fair Value		Units	Weighted Average Grant-Date Fair Value
Outstanding at beginning of period:	559	$	16.92	443	$	20.55
Granted	—	$	—	334	$	14.04
Released	(120)	$	15.87	(50)	$	19.21
Forfeited	(3)	$	16.34	(8)	$	20.78
Outstanding at end of period:	436	$	17.21	719	$	17.61

A summary of the Company's PRSU activity is as follows:


	Three months ended March 31,
	2020				2019
	Units	Weighted Average Grant-Date Fair Value		Units	Weighted Average Grant-Date Fair Value
Outstanding at beginning of period:	260	$	16.77	277	$	17.80
Granted	—	$	—	—	$	—
Performance condition adjustments	1	$	13.63	(3)	$	18.46
Released	(19)	$	19.46	(17)	$	20.22
Forfeited	—	$	—	—	$	—
Outstanding at end of period:	242	$	15.42	257	$	17.35

- Definition

Tabular disclosure of an equity-based arrangement (such as stock or unit options and stock or unit awards) with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain equity-based awards at future dates, sometimes including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares or units issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

+ References + Details

Earnings (loss) per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Computations of Basic and Diluted Earnings per Share

The following table sets forth the computations of basic and diluted earnings per share:


	Three months ended
	March 31, 2020		March 31, 2019

Basic earnings (loss) per share:
Numerator:
Net loss attributable to Mistras Group, Inc.	$	(98,509)	$	(5,293)
Denominator:
Weighted-average common shares outstanding	28,963		28,574
Basic earnings (loss) per share	$	(3.40)	$	(0.19)

Diluted earnings (loss) per share:
Numerator:
Net loss attributable to Mistras Group, Inc.	$	(98,509)	$	(5,293)
Denominator:
Weighted-average common shares outstanding	28,963		28,574
Dilutive effect of stock options outstanding^{(1), (2)}	—		—
Dilutive effect of restricted stock units outstanding^{(1), (2)}	—		—
	28,963		28,574
Diluted earnings (loss) per share	$	(3.40)	$	(0.19)

_______________

⁽¹⁾For the three months ended March 31, 2020, 99 shares related to restricted stock were excluded from the calculation of diluted EPS due to the net loss for the period.

Acquisitions and Dispositions (Tables)

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed






Cash paid	$	4,380
Working capital adjustments	(152)
Fair value of contingent consideration	1,142
Total consideration	$	5,370

Current net assets	$	142
Other assets	34
Property, plant and equipment	65
Intangibles	3,594
Goodwill	1,535
Net assets acquired	$	5,370

Schedule of Acquisition-related Expenses

These amounts are reported as Acquisition-related expense, net on the Unaudited Condensed Consolidated Statements of Income (Loss) and were as follows for the three months ended March 31, 2020 and 2019:


	Three months ended March 31,
	2020		2019
Due diligence, professional fees and other transaction costs	$	—	$	148
Adjustments to fair value of contingent consideration liabilities	(542)		305
Acquisition-related expense, net	$	(542)	$	453

Accounts Receivable, net (Tables)

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Schedule of Accounts Receivable, Net

Accounts receivable consisted of the following:


	March 31, 2020		December 31, 2019

Trade accounts receivable	$	132,905	$	144,282
Allowance for doubtful accounts	(7,775)		(8,285)
Accounts receivable, net	$	125,130	$	135,997

Property, Plant and Equipment, net (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment, Net

Property, plant and equipment consisted of the following:


	Useful Life (Years)	March 31, 2020		December 31, 2019

Land		$	2,656	$	2,672
Buildings and improvements	30-40	24,211		24,537
Office furniture and equipment	5-8	17,443		17,227
Machinery and equipment	5-7	225,230		225,974
		269,540		270,410
Accumulated depreciation and amortization		(174,569)		(171,803)
Property, plant and equipment, net		$	94,971	$	98,607

Goodwill (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill by segment is shown below:


	Services		International		Products and Systems		Total
Balance at December 31, 2019	$	247,215	$	35,195	$	—	$	282,410
Goodwill acquired during the period	—		—		—		—
Impairment charges	(57,227)		(19,862)		—		(77,089)
Adjustments to preliminary purchase price allocations	—		—		—		—
Foreign currency translation	(8,002)		(1,030)		—		(9,032)
Balance at March 31, 2020	$	181,986	$	14,303	$	—	$	196,289

Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Net Carrying Amount of Intangible Assets

The gross amount, accumulated amortization and net carrying amount of intangible assets were as follows:


		March 31, 2020														December 31, 2019
	Useful Life (Years)	Gross Amount		Accumulated Amortization		Impairment		Net Carrying Amount		Gross Amount		Accumulated Amortization		Net Carrying Amount

Customer relationships	5-18	$	111,825	$	(68,262)	$	(2,206)	$	41,357	$	113,861	$	(67,853)	$	46,008
Software/Technology	3-15	73,493		(20,220)		(25,874)		27,399		77,914		(18,756)		59,158
Covenants not to compete	2-5	12,624		(11,662)		(212)		750		12,795		(11,630)		1,165
Other	2-12	10,768		(7,753)		(502)		2,513		10,813		(7,607)		3,206
Total		$	208,710	$	(107,897)	$	(28,794)	$	72,019	$	215,383	$	(105,846)	$	109,537

Accrued Expenses and Other Current Liabilities (Tables)

3 Months Ended

Mar. 31, 2020

Payables and Accruals [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:


	March 31, 2020		December 31, 2019

Accrued salaries, wages and related employee benefits	$	25,396	$	30,072
Contingent consideration, current portion	976		2,614
Accrued workers’ compensation and health benefits	5,333		4,467
Deferred revenue	6,153		5,860
Pension accrual	2,519		2,519
Right-of-use liability - operating	9,947		10,133
Other accrued expenses	24,832		25,724
Total	$	75,156	$	81,389

Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt

Long-term debt consisted of the following:


	March 31, 2020		December 31, 2019

Senior credit facility	$	156,600	$	151,773
Senior secured term loan, net of debt issuance costs of $0.1 million	93,674		94,919

Other	7,752		8,021
Total debt	258,026		254,713
Less: Current portion	(7,240)		(6,593)
Long-term debt, net of current portion	$	250,786	$	248,120

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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+ Details

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Changes in Fair Value of Level 3 Contingent Consideration

The following table represents the changes in the fair value of Level 3 contingent consideration:


	Three months ended March 31,
	2020		2019
Beginning balance	$	3,216	$	2,365

Payments	(1,303)		—
Accretion of liability	11		44
Revaluation	(553)		261
Foreign currency translation	(62)		29
Ending balance	$	1,309	$	2,699

Leases (Tables)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Schedule of Supplemental Balance Sheet Information

The Company’s Condensed Consolidated Balance Sheets includes the following related to operating leases:


Leases	Classification	March 31, 2020		December 31, 2019
Assets
ROU assets	Other Assets	$	44,669	$	45,817

Liabilities
ROU - current	Accrued and other current liabilities	$	9,947	$	10,133
ROU liability - long-term	Other liabilities	35,927		36,750
Total ROU liabilities		$	45,874	$	46,883

Schedule of Components of Lease Costs and Other Information Related to Leases

The components of lease costs were as follows:


		Three months ended
	Classification	March 31, 2020		March 31, 2019
Finance lease expense
Amortization of ROU assets	Depreciation and amortization	$	1,228	$	1,292
Interest on lease liabilities	Interest expense	218		197
Operating lease expense	Cost of revenue; Selling, general & administrative expenses	3,528		3,023
Short-term lease expense	Cost of revenue; Selling, general & administrative expenses	1		133
Variable lease expense	Cost of revenue; Selling, general & administrative expenses	349		272
Total		$	5,324	$	4,917

Additional information related to leases was as follows:


	Three months ended
	March 31, 2020			March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities for finance leases
Finance - financing cash flows	$	1,167		$	1,249
Finance - operating cash flows	$	217		$	197
Operating - operating cash flows	$	3,291		$	3,079
ROU assets obtained in the exchange for lease liabilities
Finance leases	$	667		$	1,086
Operating leases	$	1,625		$	1,348
Weighted-average remaining lease term (in years)
Finance leases	5.9			5.8
Operating leases	6.1			6.0
Weighted-average discount rate
Finance leases	5.6		%	6.5		%
Operating leases	5.8		%	6.0		%

Schedule of Maturities of Operating Lease Liabilities

Maturities of lease liabilities as of March 31, 2020 were as follows:


	Finance		Operating
Remainder of 2020	$	4,762	$	9,348
2021	4,345		10,558
2022	3,489		8,472
2023	2,618		7,038
2024	1,708		5,478
Thereafter	917		13,729
Total	17,839		54,623
Less: Present value discount	(1,591)		(8,749)
Lease liability	$	16,248	$	45,874

Schedule of Maturities of Finance Lease Liabilities

Maturities of lease liabilities as of March 31, 2020 were as follows:


	Finance		Operating
Remainder of 2020	$	4,762	$	9,348
2021	4,345		10,558
2022	3,489		8,472
2023	2,618		7,038
2024	1,708		5,478
Thereafter	917		13,729
Total	17,839		54,623
Less: Present value discount	(1,591)		(8,749)
Lease liability	$	16,248	$	45,874

Segment Disclosure (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule of Consolidated Financial Information by Segment

Selected consolidated financial information by segment for the periods shown was as follows: (with intercompany transactions eliminated in Corporate and eliminations)


	Three months ended
	March 31, 2020		March 31, 2019
Revenues
Services	$	128,873	$	140,298
International	29,067		35,162
Products and Systems	2,812		3,432
Corporate and eliminations	(1,287)		(2,105)
	$	159,465	$	176,787


	Three months ended
	March 31, 2020		March 31, 2019
Gross profit
Services	$	32,237	$	37,365
International	8,023		10,360
Products and Systems	368		1,239
Corporate and eliminations	16		(90)
	$	40,644	$	48,874


	Three months ended
	March 31, 2020		March 31, 2019
Income (loss) from operations
Services	$	(81,494)	$	4,053
International	(20,419)		(215)
Products and Systems	(1,680)		(1,328)
Corporate and eliminations	(7,635)		(6,906)
	$	(111,228)	$	(4,396)

Income (loss) from operations by operating segment includes intercompany transactions, which are eliminated in Corporate and eliminations.


	Three months ended
	March 31, 2020		March 31, 2019
Depreciation and amortization
Services	$	7,075	$	7,268
International	2,140		2,089
Products and Systems	253		290
Corporate and eliminations	(1)		21
	$	9,467	$	9,668


	March 31, 2020		December 31, 2019
Intangible assets, net
Services	$	61,536	$	98,284
International	9,157		9,814
Products and Systems	1,104		1,181
Corporate and eliminations	222		258
	$	72,019	$	109,537


	March 31, 2020		December 31, 2019
Total assets
Services	$	427,165	$	537,518
International	125,684		153,380
Products and Systems	16,003		16,028
Corporate and eliminations	14,693		12,952
	$	583,545	$	719,878

Description of Business and Basis of Presentation (Details)	3 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Goodwill impairment charge		$ 77,089,000
Impairment of intangibles		$ 28,800,000
Effective income tax rate		14.00%	33.00%
Senior credit facility
Restructuring Cost and Reserve [Line Items]
Maximum borrowing capacity		$ 300,000,000
Senior credit facility \| Senior Secured Term Loan
Restructuring Cost and Reserve [Line Items]
Maximum borrowing capacity		100,000,000
Services
Restructuring Cost and Reserve [Line Items]
Goodwill impairment charge		57,227,000
Impairment of ROU assets		$ 200,000
Subsequent Event \| COVID-19 Pandemic \| Forecast
Restructuring Cost and Reserve [Line Items]
Quarterly payment reduction to non-employee directors	$ 3,750,000
Subsequent Event \| COVID-19 Pandemic \| Minimum \| Forecast
Restructuring Cost and Reserve [Line Items]
Salary reduction percentage	0.25
Subsequent Event \| COVID-19 Pandemic \| Maximum \| Forecast
Restructuring Cost and Reserve [Line Items]
Salary reduction percentage	0.45

Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Revenue - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue recognized that was included in contract liability balance at the beginning of the year	$ 1.6	$ 1.8
Revenue, practical expedient, incremental cost of obtaining a contract, maximum period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction period	1 year

Share-Based Compensation - Equity Incentive Plans (Details)	3 Months Ended
	Mar. 31, 2020 plan shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employee stock ownership plans \| plan	2
2009 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards that may be granted (in shares) \| shares	0

Share-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 0
Common Stock Options
Outstanding at the beginning of the period (in shares)	5	2,105
Granted (in shares)	0	0
Exercised (in shares)	0	(4)
Expired or forfeited (in shares)	0	0
Outstanding at the end of the period (in shares)	5	2,101
Weighted Average Exercise Price
Outstanding at the beginning of period (in dollars per share)	$ 22.35	$ 13.47
Granted (in dollars per share)	0	0
Exercised (in dollars per share)	0	10.00
Expired or forfeited (in dollars per share)	0	0
Outstanding at the end of period (in dollars per share)	$ 22.35	$ 13.47
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense	$ 0	$ 0

Share-Based Compensation - Restricted Stock Unit Awards - Narrative (Details) - Restricted Stock Unit Awards - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense (benefit)	$ 1.1	$ 0.9
Unrecognized compensation cost, net of estimated forfeitures	$ 5.8
Weighted-average period over which unrecognized compensation cost is expected to be recognized (years)	2 years 2 months 12 days

Share-Based Compensation - Vesting Activity of Restricted Stock Unit Awards (Details) - Restricted Stock Unit Awards - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards vested (in shares)	120	50
Fair value of awards vested	$ 454	$ 693

Share-Based Compensation - Fully-vested Common Stock Issued to Non-employee Directors (Details) - Common Stock - Non-employee Directors shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) director shares	Mar. 31, 2019 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of non-employee directors to whom fully vested common stock is granted \| director	6
Awards issued (in shares) \| shares	0	14
Grant date fair value of awards issued \| $	$ 0	$ 200

Share-Based Compensation - Restricted Stock Units Awards - Activity (Details) - Restricted Stock Unit Awards - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restricted Stock Units Awards (Units)
Outstanding at beginning of period (in shares)	559	443
Granted (in shares)	0	334
Released (in shares)	(120)	(50)
Forfeited (in shares)	(3)	(8)
Outstanding at end of period (in shares)	436	719
Weighted Average Grant-Date Fair Value (in dollars per share)
Outstanding at the beginning of period (in dollars per share)	$ 16.92	$ 20.55
Granted (in dollars per share)	0	14.04
Released (in dollars per share)	15.87	19.21
Forfeited (in dollars per share)	16.34	20.78
Outstanding at end of period (in dollars per share)	$ 17.21	$ 17.61

Share-Based Compensation - Performance Restricted Stock Units - Narrative (Details) - PRSUs $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) performance_metric shares	Mar. 31, 2019 USD ($) shares	Dec. 31, 2019 performance_metric shares	Dec. 31, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance award metrics \| performance_metric	4
Number of units increased (decreased) during the period (in shares)			1,000	(3,000)
Recognized share-based compensation expense (benefit) \| $	$ 0.3	$ 0.2
Unrecognized compensation cost \| $	$ 1.2
Nonvested shares outstanding (in shares)	242,000	257,000	260,000	277,000
Weighted-average period over which unrecognized compensation cost is expected to be recognized (years)	1 year 10 months 24 days
Number of additional performance award metrics \| performance_metric	2
Number of awards that may be granted (in shares)	0
Shares granted (in shares)	0	0
Executive and Senior Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period (years)	1 year
Number of performance award metrics \| performance_metric			3
Requisite service period (years)			5 years
Executive and Senior Officers \| Anniversary 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			25.00%
Executive and Senior Officers \| Anniversary 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			25.00%
Executive and Senior Officers \| Anniversary 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			25.00%
Executive and Senior Officers \| Anniversary 4
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			25.00%

Share-Based Compensation - Performance Restricted Stock Units - Activity (Details) - PRSUs - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Performance Restricted Stock (Units)
Outstanding at beginning of period (in shares)	260	277
Granted (in shares)	0	0
Performance condition adjustments (in shares)	1	(3)
Released (in shares)	(19)	(17)
Forfeited (in shares)	0	0
Outstanding at end of period (in shares)	242	257
Weighted Average Grant-Date Fair Value (in dollars per share)
Outstanding at the beginning of period (in dollars per share)	$ 16.77	$ 17.80
Granted (in dollars per share)	0	0
Performance condition adjustments (in dollars per share)	13.63	18.46
Released (in dollars per share)	19.46	20.22
Forfeited (in dollars per share)	0	0
Outstanding at end of period (in dollars per share)	$ 15.42	$ 17.35

Earnings (loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic earnings (loss) per share:
Net loss attributable to Mistras Group, Inc.	$ (98,509)	$ (5,293)
Denominator:
Weighted-average common shares outstanding (in shares)	28,963	28,574
Basic earnings (loss) per share (in dollars per share)	$ (3.40)	$ (0.19)
Denominator:
Weighted-average common shares outstanding (in shares)	28,963	28,574
Dilutive effect of stock options outstanding (in shares)	0	0
Dilutive effect of restricted stock units outstanding (in shares)	0	0
Weighted average common shares outstanding, diluted (in shares)	28,963	28,574
Diluted earnings (loss) per share (in dollars per share)	$ (3.40)	$ (0.19)

Earnings (loss) per Share - Narrative (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock excluded from computation of diluted earnings per share due to net loss for the period (in shares)	99	168
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock excluded from computation of diluted earnings per share due to net loss for the period (in shares)		212

Acquisitions and Dispositions - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Sep. 30, 2019 USD ($) Entity	Mar. 31, 2020 Entity	Mar. 31, 2019 Entity
Business Acquisition [Line Items]
Number of acquisitions \| Entity		0	0
Acquisition that Provides Pipeline Integrity Management Software
Business Acquisition [Line Items]
Number of acquisitions \| Entity	1
Aggregate consideration paid \| $	$ 4,380
Contingent consideration, maximum amount \| $	$ 4,300
Contingent consideration payment period based upon achievement of specific performance metrics	3 years

Acquisitions and Dispositions - Estimated Fair Value of the Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	1 Months Ended
	Sep. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill		$ 196,289	$ 282,410
Acquisition that Provides Pipeline Integrity Management Software
Business Combination, Consideration Transferred [Abstract]
Cash paid	$ 4,380
Working capital adjustments	(152)
Fair value of contingent consideration	1,142
Total consideration	5,370
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Current net assets	142
Other assets	34
Property, plant and equipment	65
Intangibles	3,594
Goodwill	1,535
Net assets acquired	$ 5,370

Acquisitions and Dispositions - Acquisition-Related Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Combinations [Abstract]
Due diligence, professional fees and other transaction costs	$ 0	$ 148
Adjustments to fair value of contingent consideration liabilities	(542)	305
Acquisition-related expense, net	$ (542)	$ 453

Accounts Receivable, net (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Trade accounts receivable	$ 132,905	$ 144,282
Allowance for doubtful accounts	(7,775)	(8,285)
Accounts receivable, net	$ 125,130	$ 135,997

Accounts Receivable, net - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended
	Dec. 31, 2019	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled revenues accrued	$ 22,200	$ 19,100				$ 22,200
Receivables outstanding balance	135,997	125,130				135,997
Provision (reversal) of allowance for doubtful accounts receivables		0		$ 5,491
Texas Customer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables outstanding balance		$ 1,400
Amount of damages claimed	$ 1,400
Provision (reversal) of allowance for doubtful accounts receivables						$ 1,400
Renewable Energy Industry Customer \| Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (reversal) of allowance for doubtful accounts receivables			$ (1,000)	5,700	$ 700
Recovery from unrelated bad debt provision			$ 1,700	$ 200

Property, Plant and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 269,540		$ 270,410
Accumulated depreciation and amortization	(174,569)		(171,803)
Property, plant and equipment, net	94,971		98,607
Depreciation and amortization expense	6,100	$ 6,100
Depreciation and amortization expense	6,100	$ 6,100
Land
Property, Plant and Equipment, net
Property, plant and equipment, gross	2,656		2,672
Buildings and improvements
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 24,211		24,537
Buildings and improvements \| Minimum
Property, Plant and Equipment, net
Useful Life (Years)	30 years
Buildings and improvements \| Maximum
Property, Plant and Equipment, net
Useful Life (Years)	40 years
Office furniture and equipment
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 17,443		17,227
Office furniture and equipment \| Minimum
Property, Plant and Equipment, net
Useful Life (Years)	5 years
Office furniture and equipment \| Maximum
Property, Plant and Equipment, net
Useful Life (Years)	8 years
Machinery and equipment
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 225,230		$ 225,974
Machinery and equipment \| Minimum
Property, Plant and Equipment, net
Useful Life (Years)	5 years
Machinery and equipment \| Maximum
Property, Plant and Equipment, net
Useful Life (Years)	7 years

Goodwill - Changes in Carrying Amount of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Goodwill [Roll Forward]
Balance at December 31, 2019	$ 282,410
Goodwill acquired during the period	0
Impairment charges	(77,089)
Adjustments to preliminary purchase price allocations	0
Foreign currency translation	(9,032)
Balance at March 31, 2020	196,289
Services
Goodwill [Roll Forward]
Balance at December 31, 2019	247,215
Goodwill acquired during the period	0
Impairment charges	(57,227)
Adjustments to preliminary purchase price allocations	0
Foreign currency translation	(8,002)
Balance at March 31, 2020	181,986
International
Goodwill [Roll Forward]
Balance at December 31, 2019	35,195
Goodwill acquired during the period	0
Impairment charges	(19,862)
Adjustments to preliminary purchase price allocations	0
Foreign currency translation	(1,030)
Balance at March 31, 2020	14,303
Products and Systems
Goodwill [Roll Forward]
Balance at December 31, 2019	0
Goodwill acquired during the period	0
Impairment charges	0
Adjustments to preliminary purchase price allocations	0
Foreign currency translation	0
Balance at March 31, 2020	$ 0

Goodwill - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Closing stock price (in dollars per share)	$ 4.26
Goodwill impairment charge	$ 77,089
Cumulative goodwill impairment	100,200	$ 23,100
Services
Goodwill [Line Items]
Goodwill impairment charge	57,227
Cumulative goodwill impairment	57,200
International
Goodwill [Line Items]
Goodwill impairment charge	19,862
Cumulative goodwill impairment	29,800	9,900
Europe
Goodwill [Line Items]
Goodwill impairment charge	19,300
Brazil
Goodwill [Line Items]
Goodwill impairment charge	600
Products and Systems
Goodwill [Line Items]
Goodwill impairment charge	0
Cumulative goodwill impairment	$ 13,200	$ 13,200

Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 208,710	$ 215,383
Accumulated Amortization	(107,897)	(105,846)
Impairment	(28,794)
Net Carrying Amount	72,019	109,537
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	111,825	113,861
Accumulated Amortization	(68,262)	(67,853)
Impairment	(2,206)
Net Carrying Amount	$ 41,357	46,008
Customer relationships \| Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years
Customer relationships \| Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	18 years
Software/Technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 73,493	77,914
Accumulated Amortization	(20,220)	(18,756)
Impairment	(25,874)
Net Carrying Amount	$ 27,399	59,158
Software/Technology \| Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	3 years
Software/Technology \| Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	15 years
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 12,624	12,795
Accumulated Amortization	(11,662)	(11,630)
Impairment	(212)
Net Carrying Amount	$ 750	1,165
Covenants not to compete \| Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	2 years
Covenants not to compete \| Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years
Other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 10,768	10,813
Accumulated Amortization	(7,753)	(7,607)
Impairment	(502)
Net Carrying Amount	$ 2,513	$ 3,206
Other \| Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	2 years
Other \| Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	12 years

Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Impairment of intangibles	$ 28.8
Amortization expense of intangibles	3.4	$ 3.6
Software/Technology
Finite-Lived Intangible Assets [Line Items]
Impairment of intangibles	25.9
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Impairment of intangibles	2.2
Other
Finite-Lived Intangible Assets [Line Items]
Impairment of intangibles	0.5
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Impairment of intangibles	$ 0.2

Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued salaries, wages and related employee benefits	$ 25,396	$ 30,072
Contingent consideration, current portion	976	2,614
Accrued workers’ compensation and health benefits	5,333	4,467
Deferred revenue	6,153	5,860
Pension accrual	2,519	2,519
Right-of-use liability - operating	9,947	10,133
Other accrued expenses	24,832	25,724
Total	$ 75,156	$ 81,389

Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 258,026	$ 254,713
Less: Current portion	(7,240)	(6,593)
Long-term debt, net of current portion	250,786	248,120
Senior credit facility
Debt Instrument [Line Items]
Total debt	156,600	151,773
Senior credit facility \| Senior Secured Term Loan
Debt Instrument [Line Items]
Total debt	93,674	94,919
Debt issuance costs	100	100
Other
Debt Instrument [Line Items]
Total debt	$ 7,752	$ 8,021

Long-Term Debt - Narrative (Details)		3 Months Ended
Long-Term Debt - Narrative (Details)	Mar. 09, 2020 USD ($) quarter	Mar. 31, 2020 USD ($) quarter	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Debt outstanding		$ 258,026,000	$ 254,713,000
Senior credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity		300,000,000
Maximum borrowing capacity in non-U.S. Dollar currencies		100,000,000
Maximum amount available for the issuance of letters of credit		20,000,000
Outstanding borrowings		250,300,000
Outstanding letters of credit		3,700,000
Capitalized debt costs		1,300,000
Amount of non-recurring charges used as threshold used for calculation of funded debt leverage ratio		$ 10,000,000.0
Number of consecutive fiscal quarters used for calculating funded debt leverage ratio \| quarter		4
Funded debt leverage ratio at which the entity will have the benefit of lowest interest margin (less than or equal to)		1.0
Funded debt leverage ratio at which the entity will bear the maximum interest rate margin (greater than)		3.75
Additional interest rate margin if funded debt leverage ratio exceeds threshold percentage		2.00%
Fixed charge coverage ratio		1.25
Preceding period used for calculating interest coverage ratio		12 months
Number of fiscal quarters to temporary increase funded debt leverage ratio \| quarter	2	4
Minimum credit exposure percentage acquisitions	0.6666
Maximum aggregate consideration for acquisitions	$ 5,000,000.0
Debt outstanding		$ 156,600,000	151,773,000
Senior credit facility \| Through December 31, 2018
Debt Instrument [Line Items]
Funded debt leverage ratio		4.25
Senior credit facility \| As of March 31, 2019 through June 30, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio		4.0
Senior credit facility \| As of September 30, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio		3.75
Senior credit facility \| Minimum
Debt Instrument [Line Items]
Funded debt leverage ratio for acquisitions		3.5
Senior credit facility \| Minimum \| As of December 31, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio		3.50
Senior credit facility \| Maximum
Debt Instrument [Line Items]
Funded debt leverage ratio for acquisitions	3.0	4.0
Senior credit facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Margin percentage		1.00%
Senior credit facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Margin percentage		2.25%
Senior credit facility \| Base rate \| Minimum
Debt Instrument [Line Items]
Margin percentage		(0.375%)
Senior credit facility \| Base rate \| Maximum
Debt Instrument [Line Items]
Margin percentage		(1.25%)
Senior credit facility \| Senior Secured Term A Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 100,000,000
Debt outstanding		93,674,000	94,919,000
Other
Debt Instrument [Line Items]
Debt outstanding		7,752,000	$ 8,021,000
Other \| Minimum
Debt Instrument [Line Items]
Debt monthly periodic payments		$ 1,000
Interest rate		0.40%
Other \| Maximum
Debt Instrument [Line Items]
Debt monthly periodic payments		$ 17,000
Interest rate		3.50%

Long-Term Debt - Subsequent Events (Details) - Senior credit facility			3 Months Ended
	May 15, 2020 USD ($) d	Mar. 09, 2020	Mar. 31, 2020 USD ($)
Debt Instrument [Line Items]
Fixed charge coverage ratio			1.25
Maximum borrowing capacity			$ 300,000,000
Quarter ended June 30, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio			4.0
Quarter ended September 30, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio			3.75
Minimum
Debt Instrument [Line Items]
Funded debt leverage ratio for acquisitions			3.5
Minimum \| Quarter ended December 31, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio			3.50
Maximum
Debt Instrument [Line Items]
Funded debt leverage ratio for acquisitions		3.0	4.0
LIBOR \| Minimum
Debt Instrument [Line Items]
Margin percentage			1.00%
LIBOR \| Maximum
Debt Instrument [Line Items]
Margin percentage			2.25%
Subsequent Event \| Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 175,000,000.0
Amount deducted from aggregate cash and cash equivalents held by company and it's subsidiaries if prepayment of credit facility is required	$ 10,000,000.0
Number of consecutive business days \| d	2
Maximum amount outstanding under the revolving credit facility if prepayment of facility is required	$ 75,000,000.0
Cash and cash equivalents if prepayment of facility is required	$ 10,000,000.0
Subsequent Event \| Credit Agreement \| Quarter ended December 31, 2020
Debt Instrument [Line Items]
Funded debt leverage ratio	5.25
Debt covenant, minimum EBITDA, amount	$ 38,550,000
Subsequent Event \| Credit Agreement \| Quarter ended September 30, 2021 and thereafter
Debt Instrument [Line Items]
Funded debt leverage ratio	3.50
Subsequent Event \| Credit Agreement \| Quarter ended March 31, 2021
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.0
Subsequent Event \| Credit Agreement \| Quarter ended June 30, 2021
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.25
Subsequent Event \| Credit Agreement \| Quarter ended June 30, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA, amount	$ 3,440,000
Subsequent Event \| Credit Agreement \| Quarter ended September 30, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA, amount	24,250,000
Subsequent Event \| Credit Agreement \| All times through September 30, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA, amount	$ 20,000,000.0
Subsequent Event \| Credit Agreement \| Maximum
Debt Instrument [Line Items]
Funded debt leverage ratio for acquisitions	2.50
Pro forma funded debt leverage ratio	3.25
Subsequent Event \| Credit Agreement \| LIBOR
Debt Instrument [Line Items]
Margin percentage	1.00%
Subsequent Event \| Credit Agreement \| LIBOR \| Minimum
Debt Instrument [Line Items]
Margin percentage	1.50%
Subsequent Event \| Credit Agreement \| LIBOR \| Maximum
Debt Instrument [Line Items]
Margin percentage	4.15%

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Contingent Consideration Liability [Roll Forward]
Revaluation	$ (542)	$ 305
Level 3
Contingent Consideration Liability [Roll Forward]
Beginning balance	3,216	2,365
Payments	(1,303)	0
Accretion of liability	11	44
Revaluation	(553)	261
Foreign currency translation	(62)	29
Ending balance	$ 1,309	$ 2,699

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
ROU assets	$ 44,669	$ 45,817
Liabilities
ROU - current	9,947	10,133
ROU liability - long-term	35,927	36,750
Total ROU liabilities	$ 45,874	$ 46,883

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Leases - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
ROU operating lease liabilities	$ 45,874		$ 46,883
Operating rental payments	3,291	$ 3,079
ROU finance lease assets	17,900		$ 19,200
Services
Lessee, Lease, Description [Line Items]
Impairment of ROU assets	200
Operating Lease Arrangement \| Company's Headquarters
Lessee, Lease, Description [Line Items]
ROU operating lease liabilities	4,300	4,500
Operating rental payments	$ 300	$ 200

Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Finance lease expense
Amortization of ROU assets	$ 1,228	$ 1,292
Interest on lease liabilities	218	197
Operating lease expense	3,528	3,023
Short-term lease expense	1	133
Variable lease expense	349	272
Total	$ 5,324	$ 4,917

Leases - Additional Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities for finance leases
Finance - financing cash flows	$ 1,167	$ 1,249
Finance - operating cash flows	217	197
Operating - operating cash flows	3,291	3,079
ROU assets obtained in the exchange for lease liabilities
Finance leases	667	1,086
Operating leases	$ 1,625	$ 1,348
Weighted-average remaining lease term (in years)
Finance leases	5 years 10 months 24 days	5 years 9 months 18 days
Operating leases	6 years 1 month 6 days	6 years
Weighted-average discount rate
Finance leases	5.60%	6.50%
Operating leases	5.80%	6.00%

Leases - Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finance
Remainder of 2020	$ 4,762
2021	4,345
2022	3,489
2023	2,618
2024	1,708
Thereafter	917
Total	17,839
Less: Present value discount	(1,591)
Lease liability	16,248
Operating
Remainder of 2020	9,348
2021	10,558
2022	8,472
2023	7,038
2024	5,478
Thereafter	13,729
Total	54,623
Less: Present value discount	(8,749)
Lease liability	$ 45,874	$ 46,883

Commitments and Contingencies (Details)	1 Months Ended			3 Months Ended		12 Months Ended
Commitments and Contingencies (Details)	Dec. 31, 2019 USD ($) welds	Sep. 30, 2019 USD ($)	Apr. 30, 2017	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2020 USD ($)
Litigation
Accounts receivable, net	$ 135,997,000			$ 125,130,000
Pension accrual	2,519,000			2,519,000
Right to Customer Contracts \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Litigation
Consideration received on sale of subsidiary							$ 100,000
Contingency charges				600,000
Payments of severance obligations				300,000
Reversal of severance obligations				600,000
Foreign Subsidiaries \| Products and Systems \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Litigation
Term of agreement to purchase products from the buyer on sale of subsidiary						3 years
Amount of purchased commitment to buy products from the buyer on sale of subsidiary				2,300,000
Remaining balance under purchase commitment agreement				1,400,000
Pension Related Contingencies
Litigation
Pension withdrawal expense		$ 900,000			$ 800,000	$ 5,900,000
Monthly payments, excluding final settlement				3,300,000
Total payments				4,200,000
Severance and Labor Disputes \| Germany \| Affiliated Entity
Litigation
Temporary employment contract period			18 months
Acquisition-related Contingencies
Litigation
Potential acquisition-related contingent consideration, low end of range				0
Potential acquisition-related contingent consideration, high end of range				$ 5,700,000
Contingent consideration payment period based upon achievement of specific performance metrics				2 years 5 months 1 day
Various Pipeline Projects For Texas Customer
Litigation
Amount of damages claimed	$ 7,600,000
Texas Customer
Litigation
Accounts receivable, net				$ 1,400,000
Number or welds not in compliance \| welds	66
Number of welds inspected \| welds	16,000
Amount of damages claimed	$ 1,400,000
Texas Customer \| Various Pipeline Projects For Texas Customer
Litigation
Amount of damages claimed	$ 1,400,000

Segment Disclosure (Details) $ in Thousands	3 Months Ended
Segment Disclosure (Details) $ in Thousands	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment	3
Financial information by segment
Revenues	$ 159,465	$ 176,787
Gross profit	40,644	48,874
Income (loss) from operations	(111,228)	(4,396)
Depreciation and amortization	9,467	9,668
Intangible assets, net	72,019		$ 109,537
Total assets	583,545		719,878
Operating segments \| Services
Financial information by segment
Revenues	128,873	140,298
Gross profit	32,237	37,365
Income (loss) from operations	(81,494)	4,053
Depreciation and amortization	7,075	7,268
Intangible assets, net	61,536		98,284
Total assets	427,165		537,518
Operating segments \| International
Financial information by segment
Revenues	29,067	35,162
Gross profit	8,023	10,360
Income (loss) from operations	(20,419)	(215)
Depreciation and amortization	2,140	2,089
Intangible assets, net	9,157		9,814
Total assets	125,684		153,380
Operating segments \| Products and Systems
Financial information by segment
Revenues	2,812	3,432
Gross profit	368	1,239
Income (loss) from operations	(1,680)	(1,328)
Depreciation and amortization	253	290
Intangible assets, net	1,104		1,181
Total assets	16,003		16,028
Corporate and eliminations
Financial information by segment
Revenues	(1,287)	(2,105)
Gross profit	16	(90)
Income (loss) from operations	(7,635)	(6,906)
Depreciation and amortization	(1)	$ 21
Intangible assets, net	222		258
Total assets	$ 14,693		$ 12,952

Revenue - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 159,465	$ 176,787
United States
Disaggregation of Revenue [Line Items]
Revenues	110,583	114,100
Other Americas
Disaggregation of Revenue [Line Items]
Revenues	20,365	28,947
Europe
Disaggregation of Revenue [Line Items]
Revenues	26,304	31,626
Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues	2,213	2,114
Oil & Gas
Disaggregation of Revenue [Line Items]
Revenues	92,498	101,385
Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenues	22,214	24,755
Industrials
Disaggregation of Revenue [Line Items]
Revenues	18,274	21,630
Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenues	7,646	9,064
Other Process Industries
Disaggregation of Revenue [Line Items]
Revenues	8,127	8,566
Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenues	7,538	6,170
Other
Disaggregation of Revenue [Line Items]
Revenues	3,168	5,217
Operating segments \| Services
Disaggregation of Revenue [Line Items]
Revenues	128,873	140,298
Operating segments \| Services \| United States
Disaggregation of Revenue [Line Items]
Revenues	109,581	113,136
Operating segments \| Services \| Other Americas
Disaggregation of Revenue [Line Items]
Revenues	18,735	26,708
Operating segments \| Services \| Europe
Disaggregation of Revenue [Line Items]
Revenues	108	428
Operating segments \| Services \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues	449	26
Operating segments \| Services \| Oil & Gas
Disaggregation of Revenue [Line Items]
Revenues	83,299	91,666
Operating segments \| Services \| Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenues	14,652	12,794
Operating segments \| Services \| Industrials
Disaggregation of Revenue [Line Items]
Revenues	12,867	16,123
Operating segments \| Services \| Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenues	5,095	6,262
Operating segments \| Services \| Other Process Industries
Disaggregation of Revenue [Line Items]
Revenues	6,004	6,319
Operating segments \| Services \| Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenues	4,517	2,590
Operating segments \| Services \| Other
Disaggregation of Revenue [Line Items]
Revenues	2,439	4,544
Operating segments \| International
Disaggregation of Revenue [Line Items]
Revenues	29,067	35,162
Operating segments \| International \| United States
Disaggregation of Revenue [Line Items]
Revenues	154	276
Operating segments \| International \| Other Americas
Disaggregation of Revenue [Line Items]
Revenues	1,505	2,229
Operating segments \| International \| Europe
Disaggregation of Revenue [Line Items]
Revenues	26,235	31,540
Operating segments \| International \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues	1,173	1,117
Operating segments \| International \| Oil & Gas
Disaggregation of Revenue [Line Items]
Revenues	9,104	9,704
Operating segments \| International \| Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenues	7,415	11,654
Operating segments \| International \| Industrials
Disaggregation of Revenue [Line Items]
Revenues	4,919	5,075
Operating segments \| International \| Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenues	1,697	1,422
Operating segments \| International \| Other Process Industries
Disaggregation of Revenue [Line Items]
Revenues	2,120	2,242
Operating segments \| International \| Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenues	2,461	2,733
Operating segments \| International \| Other
Disaggregation of Revenue [Line Items]
Revenues	1,351	2,332
Operating segments \| Products
Disaggregation of Revenue [Line Items]
Revenues	2,812	3,432
Operating segments \| Products \| United States
Disaggregation of Revenue [Line Items]
Revenues	1,559	1,970
Operating segments \| Products \| Other Americas
Disaggregation of Revenue [Line Items]
Revenues	278	66
Operating segments \| Products \| Europe
Disaggregation of Revenue [Line Items]
Revenues	340	421
Operating segments \| Products \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues	635	975
Operating segments \| Products \| Oil & Gas
Disaggregation of Revenue [Line Items]
Revenues	95	15
Operating segments \| Products \| Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenues	147	307
Operating segments \| Products \| Industrials
Disaggregation of Revenue [Line Items]
Revenues	488	432
Operating segments \| Products \| Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenues	854	1,380
Operating segments \| Products \| Other Process Industries
Disaggregation of Revenue [Line Items]
Revenues	3	5
Operating segments \| Products \| Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenues	560	847
Operating segments \| Products \| Other
Disaggregation of Revenue [Line Items]
Revenues	665	446
Corp/Elim
Disaggregation of Revenue [Line Items]
Revenues	(1,287)	(2,105)
Corp/Elim \| United States
Disaggregation of Revenue [Line Items]
Revenues	(711)	(1,282)
Corp/Elim \| Other Americas
Disaggregation of Revenue [Line Items]
Revenues	(153)	(56)
Corp/Elim \| Europe
Disaggregation of Revenue [Line Items]
Revenues	(379)	(763)
Corp/Elim \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues	(44)	(4)
Corp/Elim \| Oil & Gas
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corp/Elim \| Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corp/Elim \| Industrials
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corp/Elim \| Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corp/Elim \| Other Process Industries
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corp/Elim \| Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenues	0	0
Corp/Elim \| Other
Disaggregation of Revenue [Line Items]
Revenues	$ (1,287)	$ (2,105)