Note 9 - Segment Information (Tables)

9 Months Ended

Sep. 30, 2015

Asset [Member]

Notes Tables

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

	Sept. 30, 2015		Dec. 31, 2014
Identifiable assets:
Thermal Products	$	16,645	$	26,211
Mechanical Products		20,481		7,801
Electrical Products		3,847		4,726
	$	40,973	$	38,738

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Net revenues:
Thermal Products	$	6,259		$	5,908		$	18,635		$	17,267
Mechanical Products		1,273			3,077			6,195			9,261
Electrical Products		1,671			1,809			6,120			5,406
	$	9,203		$	10,794		$	30,950		$	31,934
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	1,165		$	1,304		$	3,731		$	3,322
Mechanical Products		(759	)		(109	)		(1,240	)		245
Electrical Products		79			203			875			608
Corporate		(78	)		(130	)		(629	)		(442	)
	$	407		$	1,268		$	2,737		$	3,733
Net earnings (loss):
Thermal Products	$	886		$	861		$	2,559		$	2,222
Mechanical Products		(577	)		(72	)		(891	)		152
Electrical Products		60			134			579			402
Corporate		(59	)		(86	)		(419	)		(296	)
	$	310		$	837		$	1,828		$	2,480

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net revenues:
U.S.	$	3,713	$	3,343	$	11,032	$	10,215
Foreign		5,490		7,451		19,918		21,719
	$	9,203	$	10,794	$	30,950	$	31,934

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

	Sept. 30, 2015		Dec. 31, 2014
Property and equipment:
U.S.	$	833	$	621
Foreign		348		647
	$	1,181	$	1,268