Note 12 - Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

	Three Months Ended March 31,
	201 8			201 7
Net Revenues:
Thermal	$	13,234		$	7,776
EMS		5,637			6,404
	$	18,871		$	14,180
Earnings (loss) before income tax expense (benefit):
Thermal	$	(92	)	$	1,846
EMS		1,292			1,698
Corporate		(218	)		(372	)
	$	982		$	3,172
Net earnings (loss):
Thermal	$	(455	)	$	1,210
EMS		1,005			1,112
Corporate		(169	)		(244	)
	$	381		$	2,078

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

	Three Months Ended March 31
	201 8		201 7
Net revenues:
U.S.	$	6,543	$	2,886
Foreign		12,328		11,294
	$	18,871	$	14,180

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

	March 31 , 201 8		December 31, 201 7
Property and equipment:
U.S.	$	1,967	$	991
Foreign		436		550
	$	2,403	$	1,541

Asset [Member]

Notes Tables

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

	Ma r ch 31, 2018		December 31, 2017
Identifiable assets:
Thermal	$	50,412	$	50,408
EMS		15,021		12,085
	$	65,433	$	62,493