Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Operating Loss Carryforwards [Line Items]
Income tax provision (benefit)	$ 2,849	$ 296	$ (3,753)
Increase in valuation allowance	55,100
Federal tax net operating loss carryforward, not subject to expiration	419,300
Federal tax net operating loss carryforward, subject to expiration	54,500
Tax credit carryforward for income tax purposes	29,200
Liability for uncertain tax positions	0	0
Unrecognized tax benefits	9,883	7,204	5,283	$ 3,339
Unrecognized tax benefits that would impact effective tax rate	9,900	7,200
Penalties and interest expense	0	$ 0	$ 0
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Federal tax net operating loss carryforward	473,800
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Federal tax net operating loss carryforward	$ 307,800