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Fair Value of Financial Instruments - Summary of Net Carrying Amounts and Estimated Fair Values of Convertible Notes (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jan. 31, 2025
Net Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes	$ 451,011	$ 652,545
Net Carrying Amount | 2026 Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes		203,907
Net Carrying Amount | 2029 Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes	451,011	448,638
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes	434,378	718,351
Estimated Fair Value | 2026 Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes		260,248
Estimated Fair Value | 2029 Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes	$ 434,378	$ 458,103

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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