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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (17,445)	$ 6,574	$ 3,893
Other comprehensive income (loss):
Foreign currency translation adjustments	5,058	(13,084)	(4,252)
Comprehensive loss	(12,387)	(6,510)	(359)
Less: net income attributable to noncontrolling interests, net of taxes	8	75	33
Less: Foreign currency translation adjustments attributable to noncontrolling interests	4	(5)	(2)
Comprehensive loss attributable to Mistras Group, Inc.	$ (12,399)	$ (6,580)	$ (390)

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