CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue, net	$ 15,302	$ 11,307
Cost of revenue	8,122	5,753
Gross profit	7,180	5,554
Operating expenses:
Research and development	3,665	3,372
Sales and marketing	2,752	2,600
General and administrative	1,713	2,135
Total operating expenses	8,130	8,107
Loss from operations	(950)	(2,553)
Other (expense):
Interest expense, net	(141)	(213)
Other income, net	10	18
Total other (expense), net	(131)	(195)
Loss before provision for income taxes	(1,081)	(2,748)
Provision for income taxes	21	27
Net loss	$ (1,102)	$ (2,775)
Net loss per share:
Basic and diluted	$ (0.05)	$ (0.18)
Weighted average number of shares used in computing net loss per share:
Basic and diluted	21,370,927	15,642,286