Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Subscription and support	$ 22,416	$ 13,347	$ 42,993	$ 25,948
Professional services and other	3,474	2,530	6,196	4,554
Total revenue	25,890	15,877	49,189	30,502
Cost of revenue:
Subscription and support	5,586	3,937	11,023	7,613
Professional services and other	2,049	1,595	3,961	2,830
Total cost of revenue	7,635	5,532	14,984	10,443
Gross profit	18,255	10,345	34,205	20,059
Operating expenses:
Sales and marketing	18,038	14,050	34,201	25,131
Research and development	8,730	5,645	16,535	10,916
General and administrative	6,003	3,923	11,739	13,969
Total operating expenses	32,771	23,618	62,475	50,016
Loss from operations	(14,516)	(13,273)	(28,270)	(29,957)
Other income (expense):
Interest income	61	4	132	7
Interest expense	(12)	(22)	(23)	(44)
Change in fair value of warrant liability		(39)	62	(527)
Other expense, net	(56)	10	(131)	(109)
Total other income (expense), net	(7)	(47)	40	(673)
Loss before income taxes	(14,523)	(13,320)	(28,230)	(30,630)
Income tax expense	(67)	(14)	(99)	(14)
Net loss	(14,590)	(13,334)	(28,329)	(30,644)
Deemed dividend to investors		(632)		(632)
Net loss attributable to common stockholders	$ (14,590)	$ (13,966)	$ (28,329)	$ (31,276)
Net loss per common share attributable to common stockholders, basic and diluted	$ (0.53)	$ (2.21)	$ (1.03)	$ (5.00)
Weighted average common shares used in computing basic and diluted net loss per common share attributable to common stockholders	27,610	6,316	27,456	6,261