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Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue	$ 1,543	$ 1,587	$ 3,102	$ 3,098
Cost of revenue	632	528	1,215	1,067
Gross profit	911	1,059	1,887	2,031
Operating expenses:
Sales and marketing	415	419	776	847
Research and development	594	670	1,179	1,400
General and administrative	282	322	613	649
Operating loss	(380)	(352)	(681)	(865)
Interest expense, net	(58)	(35)	(108)	(66)
Net loss	(438)	(387)	(789)	(931)
Preferred stock dividends accrued	(35)	(35)	(69)	(69)
Net loss attributable to common stockholders	$ (473)	$ (422)	$ (858)	$ (1,000)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.04)	$ (0.03)	$ (0.07)	$ (0.08)
Diluted (in dollars per share)	$ (0.04)	$ (0.03)	$ (0.07)	$ (0.08)
Weighted average common shares outstanding:
Basic (in shares)	12,798	12,748	12,772	12,726
Diluted (in shares)	12,798	12,748	12,772	12,726

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