CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Class A and Class B Common Stock Class A and Class B Common Stock
Beginning balance (in shares) at Jan. 31, 2024					304,691,722
Beginning balance at Jan. 31, 2024	$ 1,594,043	$ 2,934,607	$ (1,550)	$ (1,339,044)	$ 30
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					2,345,516
Issuance of common stock upon exercise of stock options	6,555	6,554			$ 1
Issuance of common stock and assumed options in connection with acquisition (in shares)					2,354,607
Issuance of common stock and assumed options in connection with acquisition	23,739	23,738			$ 1
Vesting of restricted stock units and performance stock units (in shares)					2,183,744
Vesting of restricted stock units and performance stock units	0
Repurchase of common stock (in shares)					(19,300)
Repurchase of common stock	0
Stock-based compensation	62,631	62,631
Other comprehensive income (loss)	(1,243)		(1,243)
Net loss	(70,105)			(70,105)
Ending balance (in shares) at Apr. 30, 2024					311,556,289
Ending balance at Apr. 30, 2024	1,615,620	3,027,530	(2,793)	(1,409,149)	$ 32
Beginning balance (in shares) at Jan. 31, 2025					325,579,105
Beginning balance at Jan. 31, 2025	1,669,247	3,294,542	2,158	(1,627,485)	$ 32
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					2,520,990
Issuance of common stock upon exercise of stock options	12,277	12,277
Vesting of restricted stock units and performance stock units (in shares)					2,972,074
Vesting of restricted stock units and performance stock units	1				$ 1
Stock-based compensation	71,315	71,315
Other comprehensive income (loss)	1,895		1,895
Net loss	(208,193)			(208,193)
Ending balance (in shares) at Apr. 30, 2025					331,072,169
Ending balance at Apr. 30, 2025	$ 1,546,542	$ 3,378,134	$ 4,053	$ (1,835,678)	$ 33