Note 12 - Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

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

	Three Months Ended September 30,						Nine Months Ended September 30,
Net Revenues:	2018			2017			2018			2017
Thermal	$	14,616		$	11,470		$	41,849		$	28,440
EMS		5,544			5,882			18,279			18,980
	$	20,160		$	17,352		$	60,128		$	47,420
Earnings (loss) before income tax expense (benefit):
Thermal	$	(684	)	$	1,539		$	1,816		$	4,735
EMS		1,293			1,594			4,779			5,455
Corporate		(447	)		(292	)		(1,055	)		(1,841	)
	$	162		$	2,841		$	5,540		$	8,349
Net earnings (loss):
Thermal	$	(1,192	)	$	1,183		$	768		$	3,228
EMS		978			1,021			3,928			3,471
Corporate		(352	)		(186	)		(867	)		(1,158	)
	$	(566	)	$	2,018		$	3,829		$	5,541

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Net revenues:
U.S.	$	4,982	$	4,746	$	18,343	$	12,212
Foreign		15,178		12,606		41,785		35,208
	$	20,160	$	17,352	$	60,128	$	47,420

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

	September 30, 2018		December 31, 2017
Property and equipment:
U.S.	$	2,393	$	991
Foreign		465		550
	$	2,858	$	1,541

Asset [Member]

Notes Tables

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

	September 30, 2018		December 31, 2017
Identifiable assets:
Thermal	$	54,865	$	50,408
EMS		10,616		12,085
	$	65,481	$	62,493