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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Computations of Basic and Diluted Earnings Per Share | The following table sets forth the computations of basic and diluted earnings per share:
| For the year ended December 31,
| 2021 |  | 2020 |  | 2019
Basic earnings (loss) per share: |  |  |  |  |
Numerator: |  |  |  |  |
Net income (loss) attributable to Mistras Group, Inc. | $ | 3,860 |  |  | $ | (99,461) |  |  | $ | 6,060 |
Denominator |  |  |  |  |
Weighted average common shares outstanding | 29,572 |  |  | 29,147 |  |  | 28,740 |
Basic earnings (loss) per share | $ | 0.13 |  |  | $ | (3.41) |  |  | $ | 0.21 |
Diluted earnings (loss) per share: |  |  |  |  |
Numerator: |  |  |  |  |
Net income (loss) attributable to Mistras Group, Inc. | $ | 3,860 |  |  | $ | (99,461) |  |  | $ | 6,060 |
Denominator |  |  |  |  |
Weighted average common shares outstanding | 29,572 |  |  | 29,147 |  |  | 28,740 |
Dilutive effect of stock options outstanding | 558 |  |  | — |  |  | 98 |
Dilutive effect of restricted stock units outstanding | — |  |  | — |  |  | 208 |
| 30,130 |  |  | 29,147 |  |  | 29,046 |
Diluted earnings (loss) per share | $ | 0.13 |  |  | $ | (3.41) |  |  | $ | 0.21 |
Schedule of Potential Common Shares Excluded From the Computation of Diluted Earnings Per Share | The following potential common shares were excluded from the computation of diluted earnings per share, as the effect would have been anti- dilutive:
| For the year ended December 31,
| 2021 |  | 2020 |  | 2019
Potential common stock attributable to restricted stock units (RSUs) and performance stock units (PSUs) outstanding (1) | 109 |  |  | 790 |  |  | 42 |
Potential common stock attributable to stock options outstanding | 5 |  |  | 5 |  |  | 5 |
Total | 114 |  |  | 795 |  |  | 47 |
(1) For the year ended December 31, 2020, 254 shares related to RSUs/PSUs, were excluded from the calculation of diluted EPS due to the net loss for the period.

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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