Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Reconciliation of Level 3 instruments (Details)

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Fair Value Measurements - Reconciliation of Level 3 instruments (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value as of beginning period $ 28,199 $ 900
Unrealized gains (losses) recognized as other income (10,106) (100)
Fair value as of Ending period $ 18,093 $ 800
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Income [Extensible List] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)