Stock-Based Compensation - Milestone Options Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense		$ 52,846	$ 41,001	$ 72,631	$ 108,395
Milestone Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	1,404,605
Vesting percentage	100.00%
Share-based payment arrangement, expense		900	$ 900	1,800	$ 1,800
Cost not yet recognized, amount		$ 10,900		$ 10,900
Cost not yet recognized, period for recognition				3 years 1 month 6 days