v3.22.2.2
Debt - Interest expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2022
Oct. 31, 2022
Interest Expenses [Line Items]    
Amortization of deferred loan costs $ 2,000 $ 4,600
Initial Notes | Convertible senior notes    
Interest Expenses [Line Items]    
Contractual interest expense 2,469 5,953
Amortization of deferred loan costs 1,967 4,634
Total interest expense $ 4,436 $ 10,587