CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue
Subscription and support	$ 34,969	$ 28,085	$ 68,554	$ 54,354
Professional services	8,042	5,883	19,008	14,768
Total revenue	43,011	33,968	87,562	69,122
Cost of revenue
Subscription and support	7,039	5,564	13,957	11,449
Professional services	5,538	4,189	11,726	7,966
Total cost of revenue	12,577	9,753	25,683	19,415
Gross profit	30,434	24,215	61,879	49,707
Operating expenses
Research and development	14,047	12,196	28,563	24,204
Sales and marketing	19,828	16,329	39,916	30,034
General and administrative	7,882	6,291	16,835	13,025
Total operating expenses	41,757	34,816	85,314	67,263
Loss from operations	(11,323)	(10,601)	(23,435)	(17,556)
Interest expense	(468)	(513)	(958)	(1,023)
Other income and (expense), net	278	191	854	125
Loss before provision for income taxes	(11,513)	(10,923)	(23,539)	(18,454)
Provision for income taxes	12	106	31	22
Net loss	$ (11,525)	$ (11,029)	$ (23,570)	$ (18,476)
Net loss per common share:
Basic and diluted (in dollars per share)	$ (0.28)	$ (0.28)	$ (0.58)	$ (0.47)
Weighted average common shares outstanding - basic and diluted (in shares)	40,593,908	39,627,842	40,522,790	39,610,905