Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Product	$ 10,422	$ 9,293	$ 18,808	$ 17,431
Service	15,698	9,861	28,817	18,833
Total revenue	26,120	19,154	47,625	36,264
Cost of revenue:
Product	4,094	3,512	7,339	6,805
Service	8,398	5,094	15,650	9,966
Total cost of revenue	12,492	8,606	22,989	16,771
Gross profit	13,628	10,548	24,636	19,493
Operating expenses:
Research and development	3,948	3,284	7,753	6,305
Sales and marketing	10,041	9,391	19,681	17,871
General and administrative	7,990	5,151	14,866	9,734
Change in fair value of contingent purchase price consideration	(238)	57	(2,595)	112
Settlement expense	9,635		9,635
Total operating expenses	31,376	17,883	49,340	34,022
Loss from operations	(17,748)	(7,335)	(24,704)	(14,529)
Other income (expense):
Interest expense, net	(807)	(17)	(1,630)	(34)
Foreign exchange (losses) gains	(547)	874	(653)	1,237
Other (expense) income	(122)	29	(262)	(137)
Loss before income taxes	(19,224)	(6,449)	(27,249)	(13,463)
Income tax benefit (expense)	2,458	3	2,411	(32)
Net loss	$ (16,766)	$ (6,446)	$ (24,838)	$ (13,495)
Net loss per share attributable to ordinary shareholders—basic and diluted (in dollars per share)	$ (0.74)	$ (0.29)	$ (1.10)	$ (0.60)
Weighted-average shares used to compute net loss attributable to ordinary shareholders—basic and diluted (in shares)	22,805,379	22,351,645	22,670,206	22,318,019