CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Revenues:
Subscription services	$ 117,788	$ 75,667	$ 43,051
Professional services and other	15,987	8,011	7,794
Total revenues	133,775	83,678	50,845
Cost of revenues:
Subscription services	25,055	16,804	8,813
Professional services and other	21,214	15,107	9,911
Total cost of revenues	46,269	31,911	18,724
Gross profit	87,506	51,767	32,121
Operating expenses:
Research and development	30,262	22,767	11,887
Sales and marketing	68,562	54,713	33,724
General and administrative	24,106	19,540	13,146
Total operating expenses	122,930	97,020	58,757
Loss from operations	(35,424)	(45,253)	(26,636)
Other expense, net	(1,335)	(568)	(563)
Loss before provision for income taxes	(36,759)	(45,821)	(27,199)
Provision for income taxes	848	335	101
Net loss and comprehensive loss	$ (37,607)	$ (46,156)	$ (27,300)
Net loss per share attributable to common stockholders, basic and diluted	$ (1.88)	$ (9.81)	$ (9.10)
Weighted-average number of shares used in computing net loss per share attributable to common stockholders, basic and diluted	19,988	4,704	2,999