Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 105,375	$ 78,680	$ 197,811	$ 150,572
Cost of sales	73,700	53,426	139,708	100,910
Gross profit	31,675	25,254	58,103	49,662
Selling and administrative expenses	22,988	20,510	41,640	39,965
Amortization and earnout expenses	1,450	2,282	2,900	4,072
Restructuring expenses	0	280	73	280
Acquisition and integration expenses	1,491	37	2,540	146
(Loss) income from operations	5,746	2,145	10,950	5,199
Other income (expense), net	1,936	(860)	1,478	(1,339)
Interest expense	(1,098)	(704)	(1,920)	(1,430)
Income before income taxes	6,584	581	10,508	2,430
Income tax expense	1,860	199	2,972	750
Net income	4,724	382	7,536	1,680
Non-controlling interest	339	89	356	206
Net (loss) income attributable to CECO Environmental Corp.	$ 4,385	$ 293	$ 7,180	$ 1,474
(Loss) earnings per share:
Basic	$ 0.13	$ 0.01	$ 0.21	$ 0.04
Diluted	$ 0.13	$ 0.01	$ 0.20	$ 0.04
Weighted average number of common shares outstanding:
Basic	34,873,238	35,491,725	34,961,645	35,444,477
Diluted	35,041,152	35,819,269	35,119,685	35,797,001