CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenue:
Total revenue	$ 138,281	$ 99,368	$ 268,610	$ 188,756
Cost of revenue:
Total cost of revenue	42,304	30,202	79,981	58,374
Gross profit	95,977	69,166	188,629	130,382
Operating expenses:
Sales and marketing	75,078	53,524	144,203	99,644
Research and development	49,255	37,140	94,887	68,008
General and administrative	21,424	16,174	41,359	30,979
Total operating expenses	145,757	106,838	280,449	198,631
Loss from operations	(49,780)	(37,672)	(91,820)	(68,249)
Other income (expense):
Interest income	1,032	2,231	3,759	4,534
Interest expense	(13,950)	(4,940)	(27,745)	(9,629)
Other expense, net	(845)	(296)	(1,470)	(711)
Loss before provision for (benefit from) income taxes	(63,543)	(40,677)	(117,276)	(74,055)
Provision for (benefit from) income taxes	982	(3,341)	1,216	(3,479)
Net loss	$ (64,525)	$ (37,336)	$ (118,492)	$ (70,576)
Net loss per share, basic and diluted (in dollars per share)	$ (1.10)	$ (0.67)	$ (2.04)	$ (1.28)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	58,393,894	55,647,707	58,025,799	55,186,945
Subscription
Revenue:
Total revenue	$ 132,478	$ 94,156	$ 257,334	$ 178,150
Cost of revenue:
Total cost of revenue	33,973	24,373	64,598	46,968
Services
Revenue:
Total revenue	5,803	5,212	11,276	10,606
Cost of revenue:
Total cost of revenue	$ 8,331	$ 5,829	$ 15,383	$ 11,406