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Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jul. 31, 2025	Jan. 31, 2025
Loss Contingencies [Line Items]
Total manufacturing purchase commitments	$ 69,300,000	$ 56,400,000
Liabilities recognized from adverse purchase commitments	0	0
Indemnification agreement [Member]
Loss Contingencies [Line Items]
Payments under indemnification obligations	0
Liabilities recorded under indemnification obligations	0	0
Other Matters [Member]
Loss Contingencies [Line Items]
Liabilities recorded under indemnification obligations	$ 0	$ 0

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