Note 19 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Years Ended December 31,
	2021			2020
Revenue from unaffiliated customers:
Thermal	$	52,369		$	40,209
EMS		32,509			13,614
	$	84,878		$	53,823
Depreciation/amortization:
Thermal	$	1,931		$	1,727
EMS		135			109
Corporate		40			27
	$	2,106		$	1,863
Operating income (loss):
Thermal	$	2,759		$	325
EMS		9,431			(1,113	)
Corporate		(3,731	)		(429	)
	$	8,459		$	(1,217	)
Earnings (loss) before income tax expense (benefit):
Thermal	$	2,698		$	306
EMS		9,432			(1,077	)
Corporate		(3,728	)		(460	)
	$	8,402		$	(1,231	)
Income tax expense (benefit):
Thermal	$	359		$	84
EMS		1,257			(294	)
Corporate		(497	)		(126	)
	$	1,119		$	(336	)
Net earnings (loss):
Thermal	$	2,339		$	222
EMS		8,175			(783	)
Corporate		(3,231	)		(334	)
	$	7,283		$	(895	)
Capital expenditures:
Thermal	$	518		$	371
EMS		423			284
Corporate		53			3
	$	994		$	658

Revenue from External Customers by Geographic Areas [Table Text Block]

	Years Ended December 31,
	2021		2020
Revenue from unaffiliated customers:
U.S.	$	26,802	$	22,211
Foreign		58,076		31,612
	$	84,878	$	53,823

Long-lived Assets by Geographic Areas [Table Text Block]

	December 31,
	2021		2020
Property and equipment:
U.S.	$	2,346	$	2,053
Foreign		342		297
	$	2,688	$	2,350

Asset [Member]

Notes Tables

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

	December 31,
	2021		2020
Identifiable assets:
Thermal	$	67,531	$	50,782
EMS		26,251		9,667
Corporate		10,123		1,581
	$	103,905	$	62,030