CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue
Subscription and support	$ 36,237	$ 29,832	$ 104,791	$ 84,186
Professional services	8,473	6,436	27,481	21,204
Total revenue	44,710	36,268	132,272	105,390
Cost of revenue
Subscription and support	6,694	5,319	20,651	16,768
Professional services	6,040	4,457	17,766	12,423
Total cost of revenue	12,734	9,776	38,417	29,191
Gross profit	31,976	26,492	93,855	76,199
Operating expenses
Research and development	14,342	12,766	42,905	36,970
Sales and marketing	22,354	20,903	62,270	50,937
General and administrative	8,015	7,153	24,850	20,178
Total operating expenses	44,711	40,822	130,025	108,085
Loss from operations	(12,735)	(14,330)	(36,170)	(31,886)
Interest expense	(462)	(494)	(1,420)	(1,517)
Other income and (expense), net	298	163	1,152	288
Loss before provision for income taxes	(12,899)	(14,661)	(36,438)	(33,115)
(Benefit) provision for income taxes	(8)	(31)	23	(9)
Net loss	$ (12,891)	$ (14,630)	$ (36,461)	$ (33,106)
Net loss per common share:
Basic and diluted (in dollars per share)	$ (0.32)	$ (0.37)	$ (0.90)	$ (0.83)
Weighted average common shares outstanding - basic and diluted (in shares)	40,762,960	39,980,308	40,603,430	39,735,393