Note 15 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Asset [Member]

Notes Tables

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

	December 31,
	2015		2014
Identifiable assets:
Thermal Products	$	16,983	$	26,211
Mechanical Products		19,733		7,801
Electrical Products		3,268		4,726
	$	39,984	$	38,738

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

	Years Ended December 31,
	2015			2014
Net revenues from unaffiliated customers:
Thermal Products	$	24,084		$	23,446
Mechanical Products		7,539			11,245
Electrical Products		7,266			7,105
	$	38,889		$	41,796
Depreciation/amortization:
Thermal Products	$	581		$	720
Mechanical Products		79			87
Electrical Products		94			72
	$	754		$	879
Operating income (loss):
Thermal Products	$	4,517		$	4,740
Mechanical Products		(1,902	)		(18	)
Electrical Products		673			781
Corporate		(726	)		(587	)
	$	2,562		$	4,916
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	4,479		$	4,699
Mechanical Products		(1,874	)		(5	)
Electrical Products		704			802
Corporate		(726	)		(587	)
	$	2,583		$	4,909
Income tax expense (benefit):
Thermal Products	$	1,252		$	1,407
Mechanical Products		(524	)		(2	)
Electrical Products		197			240
Corporate		(203	)		(175	)
	$	722		$	1,470

	Years Ended December 31,
	2015			2014
Net earnings (loss):
Thermal Products	$	3,227		$	3,292
Mechanical Products		(1,350	)		(3	)
Electrical Products		507			562
Corporate		(523	)		(412	)
	$	1,861		$	3,439
Capital expenditures:
Thermal Products	$	389		$	595
Mechanical Products		101			96
Electrical Products		109			140
	$	599		$	831

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

	Years Ended December 31,
	2015		2014
Net revenues from unaffiliated customers:
U.S.	$	14,294	$	14,363
Foreign		24,595		27,433
	$	38,889	$	41,796

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

	December 31,
	2015		2014
Property and equipment:
U.S.	$	797	$	621
Foreign		315		647
	$	1,112	$	1,268