Consolidated Statements of Operations (Unaudited) - 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:
Service	$ 3,253	$ 3,148	$ 6,949	$ 6,398
Subscription	1,420	1,494	2,865	2,957
License	914	815	1,864	1,682
Total revenue	5,587	5,457	11,678	11,037
Cost of revenue:
Service	1,464	1,401	3,099	2,833
Subscription	534	594	1,090	1,256
License	122	99	240	195
Total cost of revenue	2,120	2,094	4,429	4,284
Gross profit	3,467	3,363	7,249	6,753
Operating expenses:
Sales and marketing	3,997	2,856	7,989	5,811
Research, development and engineering	3,936	3,379	7,395	6,684
General and administrative	2,239	1,976	4,624	4,146
Intellectual property	345	462	737	896
Total operating expenses	10,517	8,673	20,745	17,537
Operating loss	(7,050)	(5,310)	(13,496)	(10,784)
Other income, net	116	42	234	88
Loss before income taxes	(6,934)	(5,268)	(13,262)	(10,696)
Benefit (provision) for income taxes	(9)	(15)	101	(22)
Net loss	$ (6,943)	$ (5,283)	$ (13,161)	$ (10,718)
Earnings (loss) per common share:
Loss per common share—basic	$ (0.68)	$ (0.62)	$ (1.29)	$ (1.25)
Loss per common share—diluted	$ (0.68)	$ (0.62)	$ (1.29)	$ (1.25)
Weighted average common shares outstanding—basic	10,266	8,587	10,214	8,560
Weighted average common shares outstanding—diluted	10,266	8,587	10,214	8,560