CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Revenues (Note 3)	$ 7,892	$ 7,285	$ 21,892	$ 22,852
Cost of revenues	3,049	3,276	9,842	9,182
Gross profit	4,843	4,009	12,050	13,670
Operating expenses:
Engineering and product development	224	411	831	1,309
Selling and marketing	2,487	2,492	7,737	8,312
General and administrative	2,184	1,678	6,319	4,999
Total operating expenses	4,895	4,581	14,887	14,620
Operating loss before other expense, net	(52)	(572)	(2,837)	(950)
Other income (expense), net:
Interest expense, net	(239)	(1,343)	(930)	(4,264)
Change in fair value of warrant liability	(79)	81	(101)	77
Other income, net			0	6
Loss on extinguishment of debentures	0	(11,799)	0	(11,799)
Other income (expense), net	(318)	(13,061)	(1,031)	(15,980)
Loss before income taxes	(370)	(13,633)	(3,868)	(16,930)
Income tax benefit (expense)	80	(38)	0	(181)
Net loss	(290)	(13,671)	(3,868)	(17,111)
Common Stock [Member]
Net loss	$ (257)	$ (8,235)	$ (2,493)	$ (13,835)
Net loss per share - basic and diluted (in dollars per share)	$ (0.01)	$ (3.32)	$ (0.15)	$ (5.94)
Shares used in computing net loss per basic and diluted (in shares)	29,912,827	2,477,743	16,099,752	2,328,274
Series C Preferred Stock [Member]
Net loss	$ (33)	$ (5,436)	$ (1,375)	$ (3,276)
Net loss per share - basic and diluted (in dollars per share)	$ (3.23)	$ (1,235.43)	$ (57.58)	$ (2,208.96)
Shares used in computing net loss per basic and diluted (in shares)	10,049	4,400	23,872	1,483