Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statements of Operations [Abstract]
Net revenues	$ 2,776	$ 865	$ 5,039	$ 1,879
Cost of revenues	737	452	1,075	618
Gross margin	2,039	413	3,964	1,261
Operating expenses:
Product research and development	1,629	1,742	3,208	3,526
Sales and marketing	953	756	1,803	1,798
General and administrative	1,194	1,789	2,756	3,818
Total operating expenses	3,776	4,287	7,767	9,142
Operating loss	(1,737)	$ (3,874)	(3,803)	$ (7,881)
Other expense:
Interest expense	4		8
Other expense, net	28		28
Total other expense	32		36
Loss before provision for income taxes	(1,769)	$ (3,874)	(3,839)	$ (7,881)
Provision for income taxes	23		25	1
Net loss	$ (1,792)	$ (3,874)	$ (3,864)	$ (7,882)
Loss per common share:
Basic and diluted loss per share	$ (0.04)	$ (0.10)	$ (0.10)	$ (0.20)
Basic and diluted - weighted average number of common shares outstanding	40,499	39,233	40,477	38,587