Note 11 - Segment Information (Tables)

6 Months Ended

Jun. 30, 2016

Asset [Member]

Notes Tables

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

	June 30, 2016		Dec. 31, 2015
Identifiable assets:
Thermal Products	$	17,720	$	16,983
Mechanical Products		18,815		19,733
Electrical Products		4,072		3,268
	$	40,607	$	39,984

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net revenues:
Thermal Products	$	5,594		$	6,659		$	10,788		$	12,376
Mechanical Products		2,673			2,487			4,609			4,922
Electrical Products		2,218			2,413			3,735			4,449
	$	10,485		$	11,559		$	19,132		$	21,747
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	734		$	1,537		$	1,307		$	2,566
Mechanical Products		311			(196	)		(59	)		(481	)
Electrical Products		397			477			418			796
Corporate		(693	)		(159	)		(793	)		(551	)
	$	749		$	1,659		$	873		$	2,330
Net earnings (loss):
Thermal Products	$	476		$	1,001		$	849		$	1,673
Mechanical Products		202			(128	)		(39	)		(314	)
Electrical Products		258			311			272			519
Corporate		(450	)		(104	)		(515	)		(360	)
	$	486		$	1,080		$	567		$	1,518

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Net revenues:
U.S.	$	2,903	$	3,830	$	5,630	$	7,319
Foreign		7,582		7,729		13,502		14,428
	$	10,485	$	11,559	$	19,132	$	21,747

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

	June 30, 2016		Dec. 31, 2015
Property and equipment:
U.S.	$	793	$	797
Foreign		184		315
	$	977	$	1,112