v2.4.0.8
Document and Entity Information
9 Months Ended
Feb. 28, 2015
Apr. 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 Feb. 28, 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   28,702,420
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3