Note 13 - Segment and Related Information (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended September 30, 2021
	Commercial Air Handling		Industrial And Transportation Products		Corporate and Other			Consolidated
Sales	$	8,854,347	$	17,543,510	$	-		$	26,397,857
Gross Profit	$	1,420,320	$	3,977,389	$	-		$	5,397,709
Operating Income	$	291,729	$	1,603,125	$	(26,073	)	$	1,868,781
Pretax Income	$	297,692	$	1,734,115	$	(540,407	)	$	1,491,400
Net Income	$	223,269	$	1,379,982	$	(405,374	)	$	1,197,877

	Three Months Ended September 30, 2020 (1)
	Commercial Air Handling		Industrial And Transportation Products		Corporate and Other		Consolidated
Sales	$	10,331,592	$	10,946,205	$	-	$	21,277,797
Gross Profit	$	2,488,067	$	2,364,350	$	-	$	4,852,417
Operating Income	$	1,350,939	$	659,286	$	116,192	$	2,126,417
Pretax Income	$	1,350,939	$	455,643	$	97,839	$	1,904,421
Net Income	$	1,013,204	$	339,878	$	73,008	$	1,426,090

	Nine Months Ended September 30, 2021
	Commercial Air Handling		Industrial And Transportation Products		Corporate and Other			Consolidated
Sales	$	27,591,991	$	49,249,754	$	-		$	76,841,745
Gross Profit	$	5,681,179	$	11,499,037	$	706		$	17,180,922
Operating Income	$	2,182,452	$	4,687,388	$	(555,802	)	$	6,314,038
Pretax Income	$	2,188,415	$	4,417,620	$	148,780		$	6,754,815
Net Income	$	1,641,311	$	3,471,748	$	475,540		$	5,588,599

	Nine Months Ended September 30, 2020 (1)
	Commercial Air Handling		Industrial And Transportation Products		Corporate and Other		Consolidated
Sales	$	33,634,182	$	31,501,777	$	-	$	65,135,959
Gross Profit	$	8,429,409	$	6,130,190	$	-	$	14,559,599
Operating Income	$	4,536,190	$	1,201,023	$	57,873	$	5,795,086
Pretax Income	$	4,511,225	$	422,555	$	47,633	$	4,981,413
Net Income	$	3,383,419	$	309,197	$	37,881	$	3,730,497