Note 16 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	Years Ended December 31,
	2020			2019
Net revenues from unaffiliated customers:
Thermal	$	40,209		$	43,823
EMS		13,614			16,837
	$	53,823		$	60,660
Depreciation/amortization:
Thermal	$	1,727		$	1,810
EMS		109			118
Corporate		27			14
	$	1,863		$	1,942
Operating income (loss):
Thermal	$	325		$	2,334
EMS		(1,113	)		1,725
Corporate		(429	)		(1,510	)
	$	(1,217	)	$	2,549
Earnings (loss) before income tax expense (benefit):
Thermal	$	306		$	2,370
EMS		(1,077	)		1,767
Corporate		(460	)		(1,533	)
	$	(1,231	)	$	2,604
Income tax expense (benefit):
Thermal	$	84		$	257
EMS		(294	)		194
Corporate		(126	)		(169	)
	$	(336	)	$	282
Net earnings (loss):
Thermal	$	222		$	2,113
EMS		(783	)		1,573
Corporate		(334	)		(1,364	)
	$	(895	)	$	2,322
Capital expenditures:
Thermal	$	371		$	501
EMS		284			46
Corporate		3			73
	$	658		$	620

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

	Years Ended December 31,
	2020		2019
Net revenues from unaffiliated customers:
U.S.	$	22,211	$	25,283
Foreign		31,612		35,377
	$	53,823	$	60,660

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

	December 31,
	2020		2019
Property and equipment:
U.S.	$	2,053	$	2,163
Foreign		297		257
	$	2,350	$	2,420

Asset [Member]

Notes Tables

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

	December 31,
	2020		2019
Identifiable assets:
Thermal	$	50,782	$	51,621
EMS		9,667		7,319
Corporate		1,581		775
	$	62,030	$	59,715