Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net product revenue	$ 1,587	$ 2,061	$ 3,098	$ 3,766
Net customer support and maintenance revenue		8		18
Total revenue	1,587	2,069	3,098	3,784
Cost of product revenue	528	779	1,067	1,408
Cost of customer support and maintenance revenue		3		6
Total cost of revenue	528	782	1,067	1,414
Gross profit	1,059	1,287	2,031	2,370
Operating expenses:
Sales and marketing	419	444	847	942
Research and development	670	511	1,400	1,049
General and administrative	322	310	649	641
Operating income (loss)	(352)	22	(865)	(262)
Interest expense, net	(35)	(26)	(66)	(52)
Net loss	(387)	(4)	(931)	(314)
Preferred stock dividends accrued	(35)	(35)	(69)	(69)
Net loss attributable to common stockholders	$ (422)	$ (39)	$ (1,000)	$ (383)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.03)	$ 0	$ (0.08)	$ (0.03)
Diluted (in dollars per share)	$ (0.03)	$ 0	$ (0.08)	$ (0.03)
Weighted average common shares outstanding:
Basic (in shares)	12,748	12,612	12,726	12,584
Diluted (in shares)	12,748	12,612	12,726	12,584