Note 16 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	Years Ended December 31,
	2017			2016
Net revenues from unaffiliated customers:
Ther mal	$	42,233		$	24,033
EMS		24,568			16,194
	$	66,801		$	40,227
Depreciation/amortization:
Ther mal	$	1,628		$	440
EMS		151			159
	$	1,779		$	599
Operating income (loss):
Ther mal	$	(822	)	$	4,210
EMS		6,830			989
Corporate		(2,397	)		(1,053	)
	$	3,611		$	4,146
Earnings (loss) before income tax expense (benefit):
Ther mal	$	(686	)	$	4,193
EMS		6,869			1,021
Corporate		(2,345	)		(1,007	)
	$	3,838		$	4,207
Income tax expense (benefit):
Ther mal	$	1,665		$	1,544
EMS		1,819			376
Corporate		(621	)		(371	)
	$	2,863		$	1,549
Net earnings (loss):
Ther mal	$	(2,351	)	$	2,649
EMS		5,050			645
Corporate		(1,724	)		(636	)
	$	975		$	2,658

	Years Ended December 31,
	2017		2016
Capital expenditures:
Ther mal	$	659	$	262
EMS		86		77
	$	745	$	339

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

	Years Ended December 31,
	2017		2016
Net revenues from unaffiliated customers:
U.S.	$	20,205	$	13,061
Foreign		46,596		27,166
	$	66,801	$	40,227

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

	December 31,
	2017		2016
Property and equipment:
U.S.	$	991	$	691
Foreign		550		253
	$	1,541	$	944

Asset [Member]

Notes Tables

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

	December 31,
	2017		2016
Identifiable assets:
Ther mal	$	50,408	$	19,893
EMS		12,085		22,951
	$	62,493	$	42,844