Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Stockholders (deficit) equity, beginning balance (shares) at Jan. 31, 2020				3,263,659	24,985,698
Stockholders (deficit) equity, beginning balance at Jan. 31, 2020	$ (49,180)			$ 3	$ 25	$ 988,141	$ 389	$ (1,037,738)
Increase (Decrease) in Stockholders' Equity (Deficit) [Roll Forward]
Vesting of restricted stock units (shares)					1,032,063
Exercise of stock options (shares)	374,049				374,049
Exercise of stock options	$ 8,092					8,092
Repurchase of common stock (shares)					(49,183)
Repurchase of common stock	(1,745)					(1,745)
Issuance of common stock under employee stock purchase plan (shares)					860,300
Issuance of common stock under employee stock purchase plan	6,748				$ 2	6,746
Stock-based compensation expense	33,674					33,674
Exercise of common stock warrants (shares)					68,508
Issuance of common stock warrants	3,098					3,098
Other comprehensive loss	488						488
Net loss	(84,634)	$ (9,426)	$ (75,208)					(84,634)
Stockholders (deficit) equity, ending balance (shares) at Jan. 31, 2021				3,263,659	27,271,435
Stockholders (deficit) equity, ending balance at Jan. 31, 2021	(83,459)			$ 3	$ 27	1,038,006	877	(1,122,372)
Increase (Decrease) in Stockholders' Equity (Deficit) [Roll Forward]
Vesting of restricted stock units (shares)					1,678,215
Vesting of restricted stock units	$ 3				$ 3	0
Exercise of stock options (shares)	332,137				332,137
Exercise of stock options	$ 5,621					5,621
Repurchase of common stock (shares)					(156,985)
Repurchase of common stock	(10,315)					(10,315)
Issuance of common stock under employee stock purchase plan (shares)					505,020
Issuance of common stock under employee stock purchase plan	4,133					4,133
Stock-based compensation expense	60,639					60,639
Exercise of common stock warrants (shares)					100,000
Other comprehensive loss	(489)						(489)
Net loss	(102,111)	$ (10,408)	$ (91,703)					(102,111)
Stockholders (deficit) equity, ending balance (shares) at Jan. 31, 2022		3,264,000	29,730,000	3,263,659	29,729,822
Stockholders (deficit) equity, ending balance at Jan. 31, 2022	(125,978)			$ 3	$ 30	1,098,084	388	(1,224,483)
Increase (Decrease) in Stockholders' Equity (Deficit) [Roll Forward]
Vesting of restricted stock units (shares)					1,630,656
Vesting of restricted stock units	$ 2				$ 2	0
Exercise of stock options (shares)	47,389				47,389
Exercise of stock options	$ 861					861
Issuance of common stock under employee stock purchase plan (shares)					164,959
Issuance of common stock under employee stock purchase plan	1,563					1,563
Stock-based compensation expense	83,413					83,413
Other comprehensive loss	(710)						(710)
Net loss	(105,551)	$ (10,106)	$ (95,445)					(105,551)
Stockholders (deficit) equity, ending balance (shares) at Jan. 31, 2023		3,264,000	31,573,000	3,263,659	31,572,826
Stockholders (deficit) equity, ending balance at Jan. 31, 2023	$ (146,400)			$ 3	$ 32	$ 1,183,921	$ (322)	$ (1,330,034)