Note 17 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	Years Ended December 31,
	2018		2017
Net revenues from unaffiliated customers:
Thermal	$	55,994	$	42,233
EMS		22,569		24,568
	$	78,563	$	66,801
Depreciation/amortization:
Thermal	$	1,739	$	1,628
EMS		132		151
	$	1,871	$	1,779

	Years Ended December 31,
	2018			2017
Operating income (loss):
Thermal	$	1,218		$	(822	)
EMS		5,382			6,830
Corporate		(1,420	)		(2,397	)
	$	5,180		$	3,611
Earnings (loss) before income tax expense (benefit):
Thermal	$	1,024		$	(686	)
EMS		5,416			6,869
Corporate		(1,397	)		(2,345	)
	$	5,043		$	3,838
Income tax expense (benefit):
Thermal	$	1,331		$	1,665
EMS		910			1,819
Corporate		(235	)		(621	)
	$	2,006		$	2,863
Net earnings (loss):
Thermal	$	(307	)	$	(2,351	)
EMS		4,506			5,050
Corporate		(1,162	)		(1,724	)
	$	3,037		$	975
Capital expenditures:
Thermal	$	2,149		$	659
EMS		63			86
	$	2,212		$	745

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

	Years Ended December 31,
	2018		2017
Net revenues from unaffiliated customers:
U.S.	$	25,517	$	20,205
Foreign		53,046		46,596
	$	78,563	$	66,801

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

	December 31,
	2018		2017
Property and equipment:
U.S.	$	2,327	$	991
Foreign		390		550
	$	2,717	$	1,541

Asset [Member]

Notes Tables

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

	December 31,
	2018		2017
Identifiable assets:
Thermal	$	55,343	$	50,408
EMS		11,844		12,085
	$	67,187	$	62,493