v2.4.0.8
Document and Entity Information
3 Months Ended
Aug. 31, 2015
Oct. 01, 2015
Document and Entity Information    
Entity Registrant Name Mistras Group, Inc.  
Entity Central Index Key 0001436126  
Document Type 10-Q  
Document Period End Date Aug. 31, 2015  
Amendment Flag false  
Current Fiscal Year End Date --05-31  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   28,861,316
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q1