Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue	$ 2,263	$ 1,559
Cost of revenue	852	583
Gross profit	1,411	976
Operating expenses:
Sales and marketing	414	361
Research and development	303	585
General and administrative	295	331
Operating income (loss)	399	(301)
Interest expense, net	(53)	(50)
Net income (loss)	346	(351)
Preferred stock dividend accrued	(36)	(35)
Net income (loss) attributable to common stockholders	$ 310	$ (386)
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.02	$ (0.03)
Diluted (in dollars per share)	$ 0.02	$ (0.03)
Weighted average common shares outstanding:
Basic (in shares)	12,946	12,748
Diluted (in shares)	14,730	12,748