Note 15 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	Years Ended December 31,
	2016			2015
Net revenues from unaffiliated customers:
Thermal	$	24,033		$	24,084
EMS		16,194			14,805
	$	40,227		$	38,889
Depreciation/amortization:
Thermal	$	440		$	581
EMS		159			173
	$	599		$	754
Operating income (loss):
Thermal	$	4,210		$	4,517
EMS		989			(1,229	)
Corporate		(1,053	)		(726	)
	$	4,146		$	2,562
Earnings (loss) before income tax expense (benefit):
Thermal	$	4,193		$	4,479
EMS		1,021			(1,170	)
Corporate		(1,007	)		(726	)
	$	4,207		$	2,583
Income tax expense (benefit):
Thermal	$	1,544		$	1,252
EMS		376			(327	)
Corporate		(371	)		(203	)
	$	1,549		$	722
Net earnings (loss):
Thermal	$	2,649		$	3,227
EMS		645			(843	)
Corporate		(636	)		(523	)
	$	2,658		$	1,861

	Years Ended December 31,
	2016		2015
Capital expenditures:
Thermal	$	262	$	389
EMS		77		210
	$	339	$	599

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

	Years Ended December 31,
	2016		2015
Net revenues from unaffiliated customers:
U.S.	$	13,061	$	14,294
Foreign		27,166		24,595
	$	40,227	$	38,889

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

	December 31,
	2016		2015
Property and equipment:
U.S.	$	691	$	797
Foreign		253		315
	$	944	$	1,112

Asset [Member]

Notes Tables

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

	December 31,
	2016		2015
Identifiable assets:
Thermal	$	19,893	$	16,983
EMS		22,951		23,001
	$	42,844	$	39,984