Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Earnings per share amounts are computed independently each quarter. Accordingly, the sum of each quarter’s per share amount may not equal the total per share amount for the respective year.

	Quarter
(Table only in thousands, except per share data)	First		Second		Third			Fourth
Year ended December 31, 2016
Net sales	$	103,175	$	112,258	$	101,596		$	99,982
Gross profit		31,586		33,930		33,676			35,667
Net income (loss)		3,055		4,037		5,826			(51,172	)
Net income (loss) attributable to CECO Environmental Corp.		3,100		4,050		5,804			(51,172	)
Basic earnings (loss) per share	$	0.09	$	0.12	$	0.17		$	(1.49	)
Diluted earnings (loss) per share	$	0.09	$	0.12	$	0.17		$	(1.49	)
Year ended December 31, 2015
Net sales	$	80,985	$	86,961	$	98,230		$	101,246		(1)
Gross profit		20,975		26,628		30,795			30,773		(1)
Net income (loss)		198		2,104		(4,825	)		(3,211	)
Net income (loss) attributable to CECO Environmental Corp.		198		2,104		(4,825	)		(3,079	)
Basic earnings (loss) per share	$	0.01	$	0.08	$	(0.17	)	$	(0.09	)
Diluted earnings (loss) per share	$	0.01	$	0.08	$	(0.17	)	$	(0.09	)

(1) In making final closing adjustments for the year ended December 31, 2015, the Company became aware of additional information affecting the determination of year-to-date revenue recognition for certain business units, which resulted in the Company recording, for the three month period ended December 31, 2015, a decrease in net sales of $5.2 million, and a decrease in cost of goods sold of $5.0 million.