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 Products	$	24,033		$	24,084
Mechanical Products		8,309			7,539
Electrical Products		7,885			7,266
	$	40,227		$	38,889
Depreciation/amortization:
Thermal Products	$	440		$	581
Mechanical Products		58			79
Electrical Products		101			94
	$	599		$	754
Operating income (loss):
Thermal Products	$	4,210		$	4,517
Mechanical Products		(74	)		(1,902	)
Electrical Products		1,063			673
Corporate		(1,053	)		(726	)
	$	4,146		$	2,562
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	4,193		$	4,479
Mechanical Products		(72	)		(1,874	)
Electrical Products		1,093			704
Corporate		(1,007	)		(726	)
	$	4,207		$	2,583
Income tax expense (benefit):
Thermal Products	$	1,544		$	1,252
Mechanical Products		(26	)		(524	)
Electrical Products		402			197
Corporate		(371	)		(203	)
	$	1,549		$	722
Net earnings (loss):
Thermal Products	$	2,649		$	3,227
Mechanical Products		(46	)		(1,350	)
Electrical Products		691			507
Corporate		(636	)		(523	)
	$	2,658		$	1,861
Capital expenditures:
Thermal Products	$	262		$	389
Mechanical Products		44			101
Electrical Products		33			109
	$	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 Products	$	19,893	$	16,983
Mechanical Products		18,359		19,733
Electrical Products		4,592		3,268
	$	42,844	$	39,984