Note 9 - Segment Information (Tables)

9 Months Ended

Sep. 30, 2014

Note 9 - Segment Information (Tables) [Line Items]

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

	Three Months Ended Sept. 30,						Nine Months Ended Sept. 30,
Net revenues from unaffiliated customers:	2014			2013			2014			2013
Thermal Products	$	5,908		$	5,844		$	17,267		$	17,514
Mechanical Products		3,077			2,193			9,261			7,784
Electrical Products		1,809			1,863			5,406			4,793
	$	10,794		$	9,900		$	31,934		$	30,091
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	1,304		$	1,232		$	3,322		$	3,468
Mechanical Products		(109	)		(346	)		245			(742	)
Electrical Products		203			294			608			493
Corporate		(130	)		(66	)		(442	)		(248	)
	$	1,268		$	1,114		$	3,733		$	2,971
Net earnings (loss):
Thermal Products	$	861		$	1,206		$	2,222		$	2,847
Mechanical Products		(72	)		(339	)		152			(686	)
Electrical Products		134			288			402			422
Corporate		(86	)		(65	)		(296	)		(198	)
	$	837		$	1,090		$	2,480		$	2,385

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

	Three Months Ended Sept. 30,				Nine Months Ended Sept. 30,
Net revenues from unaffiliated customers:	2014		2013		2014		2013
U.S.	$	3,343	$	3,098	$	10,215	$	9,816
Foreign		7,451		6,802		21,719		20,275
	$	10,794	$	9,900	$	31,934	$	30,091

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

Property and equipment:	Sept. 30, 2014		Dec. 31, 2013
U.S.	$	655	$	700
Foreign		563		554
	$	1,218	$	1,254

Asset [Member]

Note 9 - Segment Information (Tables) [Line Items]

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

Identifiable assets:	Sept. 30, 2014		Dec. 31, 2013
Thermal Products	$	25,157	$	23,934
Mechanical Products		8,466		7,093
Electrical Products		4,760		4,454
	$	38,383	$	35,481