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Earnings per Share | 3 Months Ended
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Mar. 31, 2022
Earnings Per Share [Abstract] |
Earnings per Share | 8. Earnings per Share The computational components of basic and diluted earnings per share for the three-month periods ended March 31, are below.
|  | 2022 |  |  | 2021 |
(table only in thousands) Numerator (for basic and diluted earnings per share) |  |  |  |  |  |
Net income attributable to CECO Environmental Corp. |  | $ | 2,792 |  |  | $ | 1,181 |
Denominator |  |  |  |  |  |
Basic weighted-average shares outstanding |  |  | 35,051 |  |  |  | 35,397 |
Common stock equivalents arising from stock options and restricted stock awards |  |  | 148 |  |  |  | 377 |
Diluted weighted-average shares outstanding |  |  | 35,199 |  |  |  | 35,774 |
Options and restricted stock units included in the computation of diluted earnings per share are calculated using the treasury stock method. For the three-month periods ended March 31, 2022 and 2021, 2.1 million and 1.5 million, respectively, of outstanding options and restricted stock units were excluded from the computation of diluted earnings per share due to their having an anti-dilutive effect. Once a restricted stock unit vests, it is included in the computation of weighted average shares outstanding for purposes of basic and diluted earnings per share.

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