CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) [Abstract]
Net sales	$ 5,285	$ 11,350	$ 15,532	$ 22,900
Cost of sales	2,995	5,646	8,324	11,110
Gross profit	2,290	5,704	7,208	11,790
Operating expenses:
Engineering, design and product development	1,367	1,115	2,752	2,280
Selling and marketing	1,419	2,089	3,627	3,943
General and administrative	2,242	2,191	4,862	4,481
Operating expenses	5,028	5,395	11,241	10,704
Operating (loss) income	(2,738)	309	(4,033)	1,086
Interest and other expense:
Interest, net	(25)	(7)	(22)	(13)
Other, net	(11)	(142)	(176)	(52)
Interest and other expense	(36)	(149)	(198)	(65)
(Loss) income before income taxes	(2,774)	160	(4,231)	1,021
Income tax (benefit) provision	(921)	(26)	(1,386)	89
Net (loss) income	$ (1,853)	$ 186	$ (2,845)	$ 932
Net (loss) income per common share:
Basic (in dollars per share)	$ (0.25)	$ 0.02	$ (0.38)	$ 0.12
Diluted (in dollars per share)	$ (0.25)	$ 0.02	$ (0.38)	$ 0.12
Shares used in per-share calculation:
Basic (in shares)	7,543	7,462	7,525	7,461
Diluted (in shares)	7,543	7,597	7,525	7,607