Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue
Subscription	$ 130,061	$ 99,924	$ 78,719
Professional services	30,508	29,327	27,896
Total revenue	160,569	129,251	106,615
Cost of revenue
Subscription	27,298	23,457	14,686
Professional services	26,862	25,720	25,731
Total cost of revenue	54,160	49,177	40,417
Gross profit	106,409	80,074	66,198
Operating expenses
Research and development	35,475	30,553	23,099
Sales and marketing	75,856	71,337	60,775
General and administrative	23,229	17,763	14,245
Total operating expenses	134,560	119,653	98,119
Loss from operations	(28,151)	(39,579)	(31,921)
Other income (expense)
Interest (expense) income and other, net	(1,533)	(18)	2
Foreign exchange loss	(1,417)	(1,301)	(697)
Loss before provision for income taxes	(31,101)	(40,898)	(32,616)
Provision for income taxes	(452)	(109)	(256)
Net loss	$ (31,553)	$ (41,007)	$ (32,872)
Net loss per share attributable to common stockholders, basic and diluted	$ (1.61)	$ (3.24)	$ (2.72)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	19,595	12,653	12,080