Consolidated Statements of Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 677,131	$ 592,571	$ 748,586
Cost of revenue	457,013	391,855	509,489
Depreciation	22,971	22,185	21,800
Gross profit	197,147	178,531	217,297
Selling, general and administrative expenses	161,334	157,157	168,621
Bad debt provision for troubled customers, net of recoveries	0	0	3,038
Impairment charges	0	106,062	0
Legal settlement and litigation charges (benefit), net	2,042	(220)	0
Pension withdrawal expense	0	0	848
Research and engineering	2,518	2,892	3,045
Depreciation and amortization	11,950	13,520	16,733
Acquisition-related expense, net	1,133	337	875
Income (loss) from operations	18,170	(101,217)	24,137
Interest expense	10,882	12,955	13,698
Income (loss) before provision for income taxes	7,288	(114,172)	10,439
Provision (benefit) for income taxes	3,395	(14,706)	4,359
Net income (loss)	3,893	(99,466)	6,080
Less: net income (loss) attributable to noncontrolling interests, net of taxes	33	(5)	20
Net income (loss) attributable to Mistras Group, Inc.	$ 3,860	$ (99,461)	$ 6,060
Earnings (loss) per common share
Basic (in dollars per share)	$ 0.13	$ (3.41)	$ 0.21
Diluted (in dollars per share)	$ 0.13	$ (3.41)	$ 0.21
Weighted average common shares outstanding:
Basic (in shares)	29,572	29,147	28,740
Diluted (in shares)	30,130	29,147	29,046

This element represents acquisition-related costs incurred in connection with business combinations which costs have been expensed during the period. This also includes adjustments to the fair value of the initial purchase price allocation for acquisitions including, but not limited to, changes in contingent consideration liabilities and other liabilities, accounts receivable, inventory, fixed assets, other assets, and other acquisition-related intangible assets. Acquisition-related costs also include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

No definition available.