CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Series A Convertible Preferred Stock	Common Stock Class A Common Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Balance, Beginning at Jan. 31, 2019	$ 31,405			$ 14	$ 1,165,266		$ 23	$ (1,133,898)
Balance, Beginning, Shares at Jan. 31, 2019				144,311,000
Issuance of common stock under employee equity plans, net of shares withheld for employee payroll taxes	(13,937)			$ 1	(13,938)
Issuance of common stock under employee equity plans, net of shares withheld for employee payroll taxes, (in shares)				6,300,000
Stock-based compensation related to stock awards	149,567				149,567
Other comprehensive loss	(330)						(330)
Net loss	(144,348)							(144,348)
Balance, Ending at Jan. 31, 2020	22,357			$ 15	1,300,895		(307)	(1,278,246)
Balance, Ending, Shares at Jan. 31, 2020				150,611,000
Issuance of common stock upon stock option exercises	$ (19,904)			$ 1	(19,905)
Issuance of common stock upon stock option exercises (in shares)	1,994,667			9,240,000
Stock-based compensation related to stock awards	$ 151,873				151,873
Equity component of convertible senior notes, net of issuance costs	68,576				68,576
Purchase of capped calls related to convertible senior notes	(27,773)				(27,773)
Other comprehensive loss	(631)						(631)
Net loss	(43,433)							(43,433)
Balance, Ending at Jan. 31, 2021	$ 151,065			$ 16	1,473,666		(938)	(1,321,679)
Balance, Ending (ASU 2020-06) at Jan. 31, 2021		$ (68,017)				$ (68,576)			$ 559
Temporary equity, Ending, Shares at Jan. 31, 2021	0
Balance, Ending, Shares at Jan. 31, 2021				159,851,000
Stock consideration in connection with fiscal 2022 acquisition	$ 10,000				10,000
Issuance of common stock under employee equity plans, net of shares withheld for employee payroll taxes	$ (32,009)			$ 1	(32,010)
Issuance of common stock under employee equity plans, net of shares withheld for employee payroll taxes, (in shares)				7,827,000
Issuance of common stock upon stock option exercises (in shares)	886,644
Stock-based compensation related to stock awards	$ 170,149				170,149
Series A convertible preferred stock, net of issuance costs			$ 485,080
Series A convertible preferred stock, net of issuance costs (in shares)			500,000
Dividend and accretion on series A convertible preferred stock	(12,419)		$ 2,800		(12,419)
Repurchases of common stock	(568,792)			$ (2)	(568,790)
Repurchases of common stock (in shares)				22,597,000
Other comprehensive loss	(3,605)						(3,605)
Net loss	(41,459)							(41,459)
Balance, Ending at Jan. 31, 2022	$ (395,087)			$ 15	$ 972,020		$ (4,543)	$ (1,362,579)
Temporary equity, Ending, Shares at Jan. 31, 2022	500,000		500,000
Temporary equity, Balance at Jan. 31, 2022	$ 487,880		$ 487,880
Balance, Ending, Shares at Jan. 31, 2022				145,081,000