XML 22 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Mar. 06, 2025
Jun. 28, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-34481    
Entity Registrant Name Mistras Group, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 22-3341267    
Entity Address, Address Line One 195 Clarksville Road    
Entity Address, City or Town Princeton Junction    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 08550    
City Area Code 609    
Local Phone Number 716-4000    
Title of 12(b) Security Common Stock, par value $.01 par value    
Trading Symbol MG    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 166.7
Entity Common Stock, Shares Outstanding   31,032,045  
Documents Incorporated by Reference
Information required by Part III (Items 10, 11, 12, 13 and 14) is incorporated by reference to portions of the registrant’s definitive proxy statement for its 2025 annual meeting of stockholders (the “Proxy Statement”), which is expected to be filed not later than 120 days after the registrant’s fiscal year ended December 31, 2024. Except as expressly incorporated by reference, the Proxy Statement shall not be deemed to be a part of this report on Form 10-K.
    
Entity Central Index Key 0001436126    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY