Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Revenue
Subscription	$ 56,080	$ 33,439	$ 104,437	$ 61,002
Professional services and other	4,915	3,997	9,565	8,221
Total revenue	60,995	37,436	114,002	69,223
Cost of revenue
Subscription	12,691	8,466	23,848	15,926
Professional services and other	6,991	5,314	13,297	10,233
Total cost of revenue	19,682	13,780	37,145	26,159
Gross profit	41,313	23,656	76,857	43,064
Operating expenses
Research and development	16,923	9,655	32,282	18,421
Sales and marketing	39,597	28,421	76,777	54,822
General and administrative	11,948	6,142	23,587	13,087
Total operating expenses	68,468	44,218	132,646	86,330
Operating loss	(27,155)	(20,562)	(55,789)	(43,266)
Other income, net	382	56	363	88
Loss before income taxes	(26,773)	(20,506)	(55,426)	(43,178)
Provision for income taxes	229	95	477	176
Net loss	$ (27,002)	$ (20,601)	$ (55,903)	$ (43,354)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.29)	$ (1.10)	$ (0.83)	$ (2.32)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)	93,576	18,802	67,125	18,687