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Long-Term Debt, Net - Schedule of Interest Expense for Notes (Detail) - Convertible Senior Notes Due 2025 - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Debt Instrument [Line Items]        
Accrued interest for interest payments $ 3,815 $ 3,903 $ 7,749 $ 4,118
Amortization of discount 4,956 3,982 9,384 4,195
Total interest expense $ 8,771 $ 7,885 $ 17,133 $ 8,313