Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue:
Products	$ 39,043	$ 27,168	$ 74,322	$ 53,110
Maintenance and support	10,610	11,338	21,363	22,140
Professional services	8,788	8,937	17,271	17,438
Total revenue	58,441	47,443	112,956	92,688
Cost of revenue:
Products	9,650	5,557	18,086	10,267
Maintenance and support	2,007	1,850	3,856	3,728
Professional services	5,736	5,672	12,045	11,348
Total cost of revenue	17,393	13,079	33,987	25,343
Total gross profit	41,048	34,364	78,969	67,345
Operating expenses:
Research and development	16,082	11,873	32,804	23,266
Sales and marketing	31,157	27,132	60,209	51,942
General and administrative	8,149	7,256	16,881	14,504
Total operating expenses	55,388	46,261	109,894	89,712
Loss from operations	(14,340)	(11,897)	(30,925)	(22,367)
Other income (expense), net:
Interest income (expense), net	464	218	705	387
Other income (expense), net	(326)	229	(248)	114
Loss before income taxes	(14,202)	(11,450)	(30,468)	(21,866)
Provision for income taxes	131	187	226	316
Net loss	$ (14,333)	$ (11,637)	$ (30,694)	$ (22,182)
Net loss per share, basic and diluted (in dollars per share)	$ (0.31)	$ (0.27)	$ (0.67)	$ (0.52)
Weighted-average common shares outstanding, basic and diluted (in shares)	46,279,947	42,681,287	45,746,513	42,395,450