Note 15 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Years Ended December 31,
	2019		2018
Net revenues from unaffiliated customers:
Thermal	$	43,823	$	55,994
EMS		16,837		22,569
	$	60,660	$	78,563
Depreciation/amortization:
Thermal	$	1,810	$	1,739
EMS		118		122
Corporate		14		10
	$	1,942	$	1,871

	Years Ended December 31,
	2019			2018
Operating income (loss):
Thermal	$	2,334		$	1,218
EMS		1,725			5,382
Corporate		(1,510	)		(1,420	)
	$	2,549		$	5,180
Earnings (loss) before income tax expense (benefit):
Thermal	$	2,370		$	1,024
EMS		1,767			5,416
Corporate		(1,533	)		(1,397	)
	$	2,604		$	5,043
Income tax expense (benefit):
Thermal	$	257		$	1,331
EMS		194			910
Corporate		(169	)		(235	)
	$	282		$	2,006
Net earnings (loss):
Thermal	$	2,113		$	(307	)
EMS		1,573			4,506
Corporate		(1,364	)		(1,162	)
	$	2,322		$	3,037
Capital expenditures:
Thermal	$	501		$	2,149
EMS		46			50
Corporate		73			13
	$	620		$	2,212

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

	Years Ended December 31,
	2019		2018
Net revenues from unaffiliated customers:
U.S.	$	25,283	$	25,517
Foreign		35,377		53,046
	$	60,660	$	78,563

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

	December 31,
	2019		2018
Property and equipment:
U.S.	$	2,163	$	2,327
Foreign		257		390
	$	2,420	$	2,717

Asset [Member]

Notes Tables

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

	December 31,
	2019		2018
Identifiable assets:
Thermal	$	51,621	$	55,343
EMS		7,319		6,692
Corporate		775		5,152
	$	59,715	$	67,187