CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Income Statement [Abstract]
Revenue	$ 202,441	$ 183,561
Cost of revenue	60,947	53,995
Gross profit	141,494	129,566
Operating expenses:
Research and development	50,859	53,114
Sales and marketing	69,811	72,750
General and administrative	31,087	27,942
Total operating expenses	151,757	153,806
Loss from operations	(10,263)	(24,240)
Interest and other expense, net	(3,999)	(1,103)
Loss before provision for income taxes	(14,262)	(25,343)
Provision for income taxes	311	207
Net loss	$ (14,573)	$ (25,550)
Net loss per share, basic and diluted	$ (0.09)	$ (0.17)
Weighted-average shares used to compute net loss per share, basic and diluted	161,733	151,943