CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS [Abstract]
Revenues	$ 31,449	$ 30,707
Cost of revenues	13,498	12,636
Gross profit	17,951	18,071
Operating expenses:
Engineering and product development	1,711	1,929
Selling and marketing	11,249	12,102
General and administrative	7,401	7,637
Total operating expenses	20,361	21,668
Loss from operations	(2,410)	(3,597)
Other income (expense), net:
Interest expense, net	(4,612)	(4,900)
Change in fair value of warrant liability	102	5,396
Other income, net	17	21
Loss on extinguishment of debentures	(11,799)	0
Other income (expense), net	(16,292)	517
Loss before income taxes	(18,702)	(3,080)
Income tax expense	129	255
Net loss	$ (18,831)	$ (3,335)
Net loss per common share:
Basic (in dollars per share)	$ (2.85)	$ (1.57)
Diluted (in dollars per share)	$ (2.85)	$ (3.77)
Shares used in computing net loss per common share:
Basic (in shares)	2,713,782	2,119,014
Diluted (in shares)	2,713,782	2,315,715
Net loss per Preferred C share - basic and diluted (in dollars per share)	$ (1,061.25)	$ 0
Shares used in computing net loss per basic and diluted Preferred C share (in shares)	10,444	0
Other comprehensive (loss) income:
Foreign currency translation adjustments	$ (2)	$ 1
Comprehensive loss	$ (18,833)	$ (3,334)