Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Revenue:
Total revenue	$ 95,670	$ 75,426	$ 189,289	$ 146,092
Cost of revenue:
Total cost of revenue	34,883	29,559	67,478	57,179
Gross profit	60,787	45,867	121,811	88,913
Operating expenses:
Research and development	22,693	22,409	42,309	45,585
Sales and marketing	46,470	38,623	80,085	74,053
General and administrative	30,076	12,404	39,914	23,920
Total operating expenses	99,239	73,436	162,308	143,558
Loss from operations	(38,452)	(27,569)	(40,497)	(54,645)
Interest income and other income (expense), net	431	154	573	18
Loss before provision for income taxes	(38,021)	(27,415)	(39,924)	(54,627)
Provision for income taxes	263	732	919	1,048
Net loss	$ (38,284)	$ (28,147)	$ (40,843)	$ (55,675)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.87)	$ (1.08)	$ (1.10)	$ (2.20)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	43,986	25,970	37,248	25,345
Subscription
Revenue:
Total revenue	$ 74,547	$ 60,099	$ 146,259	$ 115,682
Cost of revenue:
Total cost of revenue	14,699	11,968	28,160	23,403
Professional Services
Revenue:
Total revenue	21,123	15,327	43,030	30,410
Cost of revenue:
Total cost of revenue	$ 20,184	$ 17,591	$ 39,318	$ 33,776