Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Product	$ 8,310	$ 6,480	$ 22,045	$ 19,192
Service	9,634	6,845	23,952	18,195
Total revenue	17,944	13,325	45,997	37,387
Cost of revenue:
Product	3,757	2,944	9,712	8,807
Service	4,312	3,568	11,514	9,710
Total cost of revenue	8,069	6,512	21,226	18,517
Gross profit	9,875	6,813	24,771	18,870
Operating expenses:
Research and development	3,187	1,946	8,392	4,185
Sales and marketing	7,381	7,468	22,549	18,376
General and administrative	4,137	3,567	11,788	11,447
Total operating expenses	14,705	12,981	42,729	34,008
Loss from operations	(4,830)	(6,168)	(17,958)	(15,138)
Other income (expense):
Interest expense, net	(19)	(41)	(53)	(104)
Foreign exchange gains (losses)	476	76	(33)	(331)
Other (expense) income	(64)	91	50	170
Loss before income taxes	(4,437)	(6,042)	(17,994)	(15,403)
Income tax expense	46	53	94	79
Net loss	$ (4,483)	$ (6,095)	$ (18,088)	$ (15,482)
Net loss per share attributable to ordinary shareholders—basic and diluted (in dollars per share)	$ (0.20)	$ (0.35)	$ (0.84)	$ (0.89)
Weighted-average shares used to compute net loss attributable to ordinary shareholders—basic and diluted (in shares)	22,259,840	17,333,441	21,619,375	17,300,881