Note 9 - Segment Information (Tables)

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

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

	Three Months Ended March 31,
Net revenues from unaffiliated customers:	2014			2013
Thermal Products	$	5,243		$	5,898
Mechanical Products		2,047			1,793
Electrical Products		1,507			1,282
	$	8,797		$	8,973
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	811		$	1,158
Mechanical Products		(283	)		(686	)
Electrical Products		5			(8	)
Corporate		(122	)		(94	)
	$	411		$	370
Net earnings (loss):
Thermal Products	$	564		$	914
Mechanical Products		(197	)		(542	)
Electrical Products		4			(6	)
Corporate		(85	)		(74	)
	$	286		$	292

	Mar. 31, 2014		Dec. 31, 2013
Identifiable assets:
Thermal Products	$	24,423	$	23,934
Mechanical Products		6,941		7,093
Electrical Products		4,571		4,454
	$	35,935	$	35,481

	Three Months Ended March 31,
	2014		2013
Net revenues from unaffiliated customers:
U.S.	$	3,149	$	3,214
Foreign		5,648		5,759
	$	8,797	$	8,973

	Mar. 31, 2014		Dec. 31, 2013
Long-lived assets:
U.S.	$	747	$	700
Foreign		576		554
	$	1,323	$	1,254