Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2023				474,160	82,453
Beginning Balance (in shares) at Jan. 31, 2023						0
Beginning balance at Jan. 31, 2023	$ 1,920,158			$ 5	$ 1	$ 0	$ 3,736,838	$ 7,612	$ (1,824,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				898
Issuance of common stock upon exercise of stock options	1,175						1,175
Issuance of common stock upon settlement of restricted stock units (in shares)				4,246
Tax withholdings on settlement of restricted stock units (in shares)				(1,463)
Tax withholdings on settlement of restricted stock units	(25,697)						(25,697)
Charitable donation of Class A common stock (in shares)				281
Charitable donation of Class A common stock	4,215						4,215
Stock-based compensation	85,125						85,125
Other comprehensive income (loss), net	2,462							2,462
Net loss	(31,901)								(31,901)
Ending balance (in shares) at Apr. 30, 2023				478,122	82,453
Ending Balance (in shares) at Apr. 30, 2023						0
Ending balance at Apr. 30, 2023	1,955,537			$ 5	$ 1	$ 0	3,801,656	10,074	(1,856,199)
Beginning balance (in shares) at Jan. 31, 2023				474,160	82,453
Beginning Balance (in shares) at Jan. 31, 2023						0
Beginning balance at Jan. 31, 2023	1,920,158			$ 5	$ 1	$ 0	3,736,838	7,612	(1,824,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Charitable donation of Class A common stock (in shares)				300
Other comprehensive income (loss), net	(4,454)
Net loss	(123,799)	$ (105,657)	$ (18,142)
Ending balance (in shares) at Oct. 31, 2023				488,021	82,453
Ending Balance (in shares) at Oct. 31, 2023						(3,239)
Ending balance at Oct. 31, 2023	1,961,213			$ 5	$ 1	$ (52,649)	3,958,795	3,158	(1,948,097)
Beginning balance (in shares) at Apr. 30, 2023				478,122	82,453
Beginning Balance (in shares) at Apr. 30, 2023						0
Beginning balance at Apr. 30, 2023	1,955,537			$ 5	$ 1	$ 0	3,801,656	10,074	(1,856,199)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				1,824
Issuance of common stock upon exercise of stock options	2,717						2,717
Issuance of common stock upon settlement of restricted stock units (in shares)				5,026
Tax withholdings on settlement of restricted stock units (in shares)				(1,676)
Tax withholdings on settlement of restricted stock units	(27,420)						(27,420)
Issuance of common stock under employee stock purchase plan (in shares)				832
Repurchase of Class A Common Stock	9,313						9,313
Stock-based compensation	102,148						102,148
Other comprehensive income (loss), net	1,432							1,432
Net loss	(60,361)								(60,361)
Ending balance (in shares) at Jul. 31, 2023				484,128	82,453
Ending Balance (in shares) at Jul. 31, 2023						0
Ending balance at Jul. 31, 2023	1,983,366			$ 5	$ 1	$ 0	3,888,414	11,506	(1,916,560)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				837
Issuance of common stock upon exercise of stock options	1,516						1,516
Issuance of common stock upon settlement of restricted stock units (in shares)				4,639
Vesting of early exercised stock options	1						1
Tax withholdings on settlement of restricted stock units (in shares)				(1,583)
Tax withholdings on settlement of restricted stock units	(27,047)						(27,047)
Repurchase of Class A common stock (in shares)						(3,239)
Repurchase of Class A Common Stock	(52,649)					$ (52,649)
Stock-based compensation	95,911						95,911
Other comprehensive income (loss), net	(8,348)							(8,348)
Net loss	(31,537)	$ (26,951)	$ (4,586)						(31,537)
Ending balance (in shares) at Oct. 31, 2023				488,021	82,453
Ending Balance (in shares) at Oct. 31, 2023						(3,239)
Ending balance at Oct. 31, 2023	$ 1,961,213			$ 5	$ 1	$ (52,649)	3,958,795	3,158	(1,948,097)
Beginning balance (in shares) at Jan. 31, 2024		492,660	82,453	492,660	82,453
Beginning Balance (in shares) at Jan. 31, 2024	(5,840)					(5,840)
Beginning balance at Jan. 31, 2024	$ 2,016,114			$ 5	$ 1	$ (102,615)	4,024,079	8,825	(1,914,181)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				1,426
Issuance of common stock upon exercise of stock options	311						311
Issuance of common stock upon settlement of restricted stock units (in shares)				3,843
Tax withholdings on settlement of restricted stock units (in shares)				(1,317)
Tax withholdings on settlement of restricted stock units	(29,944)						(29,944)
Charitable donation of Class A common stock (in shares)				281
Charitable donation of Class A common stock	6,564						6,564
Repurchase of Class A common stock (in shares)						(938)
Repurchase of Class A Common Stock	(22,005)					$ (22,005)
Stock-based compensation	88,785						88,785
Other comprehensive income (loss), net	(4,085)							(4,085)
Net loss	(28,736)								(28,736)
Ending balance (in shares) at Apr. 30, 2024				496,893	82,453
Ending Balance (in shares) at Apr. 30, 2024						(6,778)
Ending balance at Apr. 30, 2024	$ 2,027,004			$ 5	$ 1	$ (124,620)	4,089,795	4,740	(1,942,917)
Beginning balance (in shares) at Jan. 31, 2024		492,660	82,453	492,660	82,453
Beginning Balance (in shares) at Jan. 31, 2024	(5,840)					(5,840)
Beginning balance at Jan. 31, 2024	$ 2,016,114			$ 5	$ 1	$ (102,615)	4,024,079	8,825	(1,914,181)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	2,673
Charitable donation of Class A common stock (in shares)				300
Repurchase of Class A common stock (in shares)				(31,000)
Other comprehensive income (loss), net	$ 99
Net loss	$ (125,488)	$ (107,108)	$ (18,380)
Ending balance (in shares) at Oct. 31, 2024		504,084	82,453	504,084	82,453
Ending Balance (in shares) at Oct. 31, 2024	(36,877)					(36,877)
Ending balance at Oct. 31, 2024	$ 1,731,845			$ 5	$ 1	$ (486,985)	4,249,569	8,924	(2,039,669)
Beginning balance (in shares) at Apr. 30, 2024				496,893	82,453
Beginning Balance (in shares) at Apr. 30, 2024						(6,778)
Beginning balance at Apr. 30, 2024	2,027,004			$ 5	$ 1	$ (124,620)	4,089,795	4,740	(1,942,917)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				727
Issuance of common stock upon exercise of stock options	331						331
Issuance of common stock upon settlement of restricted stock units (in shares)				3,970
Vesting of early exercised stock options	1						1
Tax withholdings on settlement of restricted stock units (in shares)				(1,293)
Tax withholdings on settlement of restricted stock units	(16,727)						(16,727)
Repurchase of Class A common stock (in shares)						(16,326)
Repurchase of Class A Common Stock	(197,427)					$ (197,427)
Issuance of common stock under employee stock purchase plan (in shares)				865
Repurchase of Class A Common Stock	8,824						8,824
Stock-based compensation	94,307						94,307
Other comprehensive income (loss), net	3,365							3,365
Net loss	(86,097)								(86,097)
Ending balance (in shares) at Jul. 31, 2024				501,162	82,453
Ending Balance (in shares) at Jul. 31, 2024						(23,104)
Ending balance at Jul. 31, 2024	1,833,581			$ 5	$ 1	$ (322,047)	4,176,531	8,105	(2,029,014)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				520
Issuance of common stock upon exercise of stock options	291						291
Issuance of common stock upon settlement of restricted stock units (in shares)				3,555
Vesting of early exercised stock options	1						1
Tax withholdings on settlement of restricted stock units (in shares)				(1,153)
Tax withholdings on settlement of restricted stock units	(14,744)						(14,744)
Repurchase of Class A common stock (in shares)				(13,800)		(13,773)
Repurchase of Class A Common Stock	(164,938)					$ (164,938)
Stock-based compensation	87,490						87,490
Other comprehensive income (loss), net	819							819
Net loss	$ (10,655)	$ (9,061)	$ (1,594)						(10,655)
Ending balance (in shares) at Oct. 31, 2024		504,084	82,453	504,084	82,453
Ending Balance (in shares) at Oct. 31, 2024	(36,877)					(36,877)
Ending balance at Oct. 31, 2024	$ 1,731,845			$ 5	$ 1	$ (486,985)	$ 4,249,569	$ 8,924	$ (2,039,669)