Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Disaggregated net sales by major source:

	Three months ended   September 30,				Nine months ended   September 30,
	2019		2018		2019		2018
	(in thousands)
Rooftop Units	$	78,432	$	86,498	$	255,532	$	244,978
Condensing Units	4,416		5,356		13,622		14,492
Air Handlers	6,523		5,686		18,150		17,479
Outdoor Mechanical Rooms	181		311		1,488		2,178
Water Source Heat Pumps	8,751		3,112		21,417		10,240
Part Sales	10,313		5,030		25,602		17,692
Other	4,884		6,944		10,948		14,548
Net Sales	$	113,500	$	112,937	$	346,759	$	321,607

Disaggregated units sold by major source:

	Three months ended   September 30,		Nine months ended   September 30,
	2019	2018	2019	2018
Rooftop Units	3,520	4,053	11,079	11,696
Condensing Units	418	611	1,291	1,647
Air Handlers	552	713	1,669	2,067
Outdoor Mechanical Rooms	7	8	28	35
Water Source Heat Pumps	1,311	1,162	5,977	3,780
Total Units	5,808	6,547	20,044	19,225