Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Subscription and support	$ 25,814	$ 17,609	$ 68,807	$ 43,557
Professional services and other	4,331	3,285	10,527	7,839
Total revenue	30,145	20,894	79,334	51,396
Cost of revenue:
Subscription and support	6,312	4,907	17,335	12,520
Professional services and other	2,326	1,887	6,287	4,717
Total cost of revenue	8,638	6,794	23,622	17,237
Gross profit	21,507	14,100	55,712	34,159
Operating expenses:
Sales and marketing	17,788	13,172	51,989	38,303
Research and development	9,297	6,525	25,832	17,441
General and administrative	6,689	4,506	18,428	18,475
Total operating expenses	33,774	24,203	96,249	74,219
Loss from operations	(12,267)	(10,103)	(40,537)	(40,060)
Other income (expense):
Interest income	104	6	236	13
Interest expense	(31)	(28)	(54)	(72)
Change in fair value of warrant liability	(10)	(9)	52	(536)
Other expense, net	(103)	(52)	(234)	(161)
Total other expense, net	(40)	(83)		(756)
Loss before income taxes	(12,307)	(10,186)	(40,537)	(40,816)
Income tax expense	(10)	(26)	(109)	(40)
Net loss	(12,317)	(10,212)	(40,646)	(40,856)
Deemed dividend to investors				(632)
Net loss attributable to common stockholders	$ (12,317)	$ (10,212)	$ (40,646)	$ (41,488)
Net loss per common share attributable to common stockholders, basic and diluted	$ (0.44)	$ (1.60)	$ (1.47)	$ (6.61)
Weighted average common shares used in computing basic and diluted net loss per common share attributable to common stockholders	28,084	6,381	27,667	6,279