Consolidated Condensed Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Consolidated Condensed Statements Of Operations [Abstract]
Revenue, net	$ 21,503	$ 29,570
Cost of goods sold	16,931	21,012
Gross profit	4,572	8,558
Operating expenses:
Sales and marketing	1,993	3,389
General and administrative	3,416	3,186
Research and development	1,201	965
Total operating expenses	6,610	7,540
Operating (loss) income	(2,038)	1,018
Interest income, net	184	215
Other expense, net	(107)	(134)
(Loss) income from continuing operations before income taxes, non-controlling interest and discontinued operations	(1,961)	1,099
Income tax expense	18	131
(Loss) income from continuing operations before non-controlling interest and discontinued operations	(1,979)	968
Loss from discontinued operations (Note 3)		(193)
Net (loss) income	$ (1,979)	$ 775
Basic (loss) income per share:
Continuing operations	$ (0.22)	$ 0.11
Discontinued operations		(0.02)
Net (loss) income per share:	(0.22)	0.09
Diluted (loss) income per share:
Continuing operations	(0.22)	0.10
Discontinued operations		(0.02)
Net (loss) income per share:	$ (0.22)	$ 0.08
Average shares outstanding:
Basic	8,813	8,705
Diluted	8,813	9,382