CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Revenues, net	$ 7,483	$ 6,738
Cost of revenues	2,874	3,345
Gross profit	4,609	3,393
Operating expenses:
Engineering and product development	304	338
Selling and marketing	3,066	2,871
General and administrative	2,480	1,884
Total operating expenses	5,850	5,093
Income (loss) from operations	(1,241)	(1,700)
Other (expense) income, net:
Interest expense, net	(135)	(363)
Change in fair value of warrant liability (see Note 1)	0	1
Other income, net	0	21
Total other (expense) income, net	(135)	(341)
Income (loss) before income taxes	(1,376)	(2,041)
Income tax benefit (expense)	43	(40)
Net loss	(1,333)	(2,081)
Loss attributable to common shares	(1,216)	(512)
Loss attributable to Preferred Series C shares	$ (117)	$ (1,569)
Loss per common share:
Basic (in dollars per share)	$ (0.04)	$ (0.12)
Diluted (in dollars per share)	$ (0.04)	$ (0.12)
Shares used in computing loss per common share:
Basic (in shares)	30,703,501	4,371,369
Diluted (in shares)	30,703,501	4,371,369
Loss per Preferred Series C share basic and diluted (in dollars per share)	$ (14.72)	$ (43.57)
Shares used in computing loss per basic and diluted Preferred Series C Shares (in shares)	7,944	36,002