CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) [Abstract]
Revenues	$ 7,480	$ 7,767	$ 23,454	$ 23,126
Cost of revenues	3,276	3,070	9,182	9,631
Gross profit	4,204	4,697	14,272	13,495
Operating expenses:
Engineering and product development	411	382	1,309	1,541
Selling and marketing	2,687	2,840	8,914	10,073
General and administrative	1,678	1,880	4,999	5,882
Total operating expenses	4,776	5,102	15,222	17,496
Operating loss before other income (expense), net	(572)	(405)	(950)	(4,001)
Other income (expense), net:
Interest expense, net	(1,343)	(1,175)	(4,264)	(3,571)
Change in fair value of warrant liability	81	132	77	5,316
Other income, net	0	3	6	(1)
Loss on extinguishment of debentures	(11,799)	0	(11,799)	0
Other income (expense), net	(13,061)	(1,040)	(15,980)	1,744
Loss before income taxes	(13,633)	(1,445)	(16,930)	(2,257)
Income tax expense	38	64	181	191
Net loss	$ (13,671)	$ (1,509)	$ (17,111)	$ (2,448)
Net loss per common share - basic and diluted (in dollars per share)	$ (3.32)	$ (0.71)
Shares used in computing net loss per basic and diluted common share (in shares)	2,477,743	2,135,952
Net loss per Preferred C share - basic and diluted (in dollars per share)	$ (1,235.43)	$ 0	$ (2,208.96)	$ 0
Shares used in computing net loss per basic and diluted Preferred C share (in shares)	4,400	0	1,483	0
Net loss per common share:
Basic (in dollars per share)			$ (5.94)	$ (1.16)
Diluted (in dollars per share)			$ (5.94)	$ (3.55)
Shares used in computing net loss per common share:
Basic (in shares)			2,328,274	2,107,365
Diluted (in shares)			2,328,274	2,189,543
Other comprehensive income (loss):
Foreign currency translation adjustments	$ 0	$ (1)	$ 0	$ 1
Comprehensive loss	$ (13,671)	$ (1,510)	$ (17,111)	$ (2,447)