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Nature of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Accounting Policies [Abstract] |
Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported within Consolidated Statements of Cash Flows | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Statements of Cash Flows.
|  | December 31, |
|  | 2024 |  |  | 2023 |
Cash and cash equivalents |  | $ | 37,832 |  |  | $ | 54,779 |
Restricted cash |  |  | 369 |  |  |  | 669 |
Total cash, cash equivalents and restricted cash |  | $ | 38,201 |  |  | $ | 55,448 |
Schedule of Numerators and Denominators Used to Calculate Basic and Diluted Earnings Per Share | Earnings per share—The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share for 2024, 2023 and 2022.
|  | For the Year Ended December 31 |
|  | 2024 |  |  | 2023 |  |  | 2022 |
(table only in thousands) |  |  |  |  |  |  |  |  |
Numerator (for basic and diluted earnings per share) |  |  |  |  |  |  |  |  |
Net income attributable to CECO Environmental Corp. |  | $ | 12,957 |  |  | $ | 12,911 |  |  | $ | 17,417 |
Denominator |  |  |  |  |  |  |  |  |
Basic weighted-average shares outstanding |  |  | 34,927 |  |  |  | 34,665 |  |  |  | 34,672 |
Common stock equivalents arising from stock options and restricted stock awards |  |  | 1,455 |  |  |  | 669 |  |  |  | 333 |
Diluted weighted-average shares outstanding |  |  | 36,382 |  |  |  | 35,334 |  |  |  | 35,005 |

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