Note 9 - Segment Information (Tables)

3 Months Ended

Mar. 31, 2015

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

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

	Three Months Ended March 31,
	2015			2014
Net revenues from unaffiliated customers:
Thermal Products	$	5,717		$	5,243
Mechanical Products		2,435			2,047
Electrical Products		2,036			1,507
	$	10,188		$	8,797
Earnings (loss) before income tax expense (benefit):
Thermal Products	$	1,029		$	811
Mechanical Products		(285	)		(283	)
Electrical Products		319			5
Corporate		(392	)		(122	)
	$	671		$	411
Net earnings (loss):
Thermal Products	$	672		$	564
Mechanical Products		(186	)		(197	)
Electrical Products		208			4
Corporate		(256	)		(85	)
	$	438		$	286

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

	Three Months Ended March 31,
	2015		2014
Net revenues from unaffiliated customers:
U.S.	$	3,489	$	3,149
Foreign		6,699		5,648
	$	10,188	$	8,797

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

	Mar. 31, 2015		Dec. 31, 2014
Property and equipment:
U.S.	$	712	$	621
Foreign		522		647
	$	1,234	$	1,268

Asset [Member]

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

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

	Mar. 31, 2015		Dec. 31, 2014
Identifiable assets:
Thermal Products	$	14,899	$	26,211
Mechanical Products		21,413		7,801
Electrical Products		3,433		4,726
	$	39,745	$	38,738