Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Disaggregated net sales by major source:

	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
	(in thousands)
Rooftop units	$	103,900	$	102,750	$	298,695	$	312,725
Condensing units	6,797		6,304		20,630		15,307
Air handlers	6,279		5,805		19,958		18,068
Outdoor mechanical rooms	208		867		1,183		2,216
Water source heat pumps	5,215		6,770		16,305		14,269
Part sales	12,102		10,484		30,325		24,562
Other	4,070		1,792		11,139		10,704
Net Sales	$	138,571	$	134,772	$	398,235	$	397,851

Disaggregated units sold by major source:

	Three Months Ended		Nine Months Ended
	September 30, 2021	September 30, 2020	September 30, 2021	September 30, 2020
Rooftop units	3,746	4,372	11,362	12,179
Condensing units	560	593	1,696	1,447
Air handlers	646	534	1,846	1,545
Outdoor mechanical rooms	2	6	22	22
Water source heat pumps	1,576	1,847	5,108	5,109
Total Units	6,530	7,352	20,034	20,302