Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statements of Operations [Abstract]
Net revenues	$ 865	$ 1,084	$ 1,879	$ 1,632
Cost of revenues	452	662	618	678
Gross margin	413	422	1,261	954
Operating expenses:
Product research and development	1,742	1,441	3,526	3,075
Sales and marketing	756	893	1,798	1,698
General and administrative	1,789	1,189	3,818	2,841
Total operating expenses	4,287	3,523	9,142	7,614
Loss before provision for income taxes	(3,874)	(3,101)	(7,881)	(6,660)
Provision for income taxes		19	1	30
Net loss	$ (3,874)	$ (3,120)	$ (7,882)	$ (6,690)
Loss per common share:
Basic and diluted loss per share	$ (0.10)	$ (0.09)	$ (0.20)	$ (0.20)
Basic and diluted - weighted average number of common shares outstanding	39,233	34,135	38,587	33,825