CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) [Abstract]
Revenues, net	$ 7,725	$ 7,388	$ 15,208	$ 14,126
Cost of revenues	2,815	3,549	5,689	6,893
Gross profit	4,910	3,839	9,519	7,233
Operating expenses:
Engineering and product development	235	269	539	607
Selling and marketing	2,958	2,378	6,024	5,249
General and administrative	2,700	2,411	5,180	4,295
Total operating expenses	5,893	5,058	11,743	10,151
Loss from operations	(983)	(1,219)	(2,224)	(2,918)
Other expense, net:
Interest expense, net	(145)	(328)	(280)	(691)
Change in fair value of warrant liability	0	(23)	0	(22)
Other income (expenses), net	0	(19)	0	1
Total other expense, net	(145)	(370)	(280)	(712)
Loss before income taxes	(1,128)	(1,589)	(2,504)	(3,630)
Income tax benefit (expense)	46	(40)	89	(80)
Net loss	(1,082)	(1,629)	(2,415)	(3,710)
Loss attributable to common shares	(1,007)	(958)	(2,226)	(1,638)
Loss attributable to Preferred Series C shares	$ (75)	$ (671)	$ (189)	$ (2,072)
Loss per common share:
Basic (in dollars per share)	$ (0.03)	$ (0.07)	$ (0.07)	$ (0.18)
Diluted (in dollars per share)	$ (0.03)	$ (0.07)	$ (0.07)	$ (0.18)
Shares used in computing loss per common share:
Basic (in shares)	31,359,104	13,734,384	31,033,114	9,078,741
Diluted (in shares)	31,359,104	13,734,384	31,033,114	9,078,741
Loss per Preferred Series C share basic and diluted (in dollars per share)	$ (11.94)	$ (25.96)	$ (26.66)	$ (67.07)
Shares used in computing loss per basic and diluted Preferred Series C Shares (in shares)	6,250	25,847	7,093	30,897