Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Loss Contingencies [Line Items]
Total manufacturing purchase commitments	$ 56,400,000	$ 30,700,000
Liabilities recognized from adverse purchase commitments	0	0
Future undiscounted lease cash payments	15,700,000
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
Santa Clara [Member] | Additional Office Space [Member]
Loss Contingencies [Line Items]
Commitment service purchase	$ 8,000,000
Lease term	104 months
Operating lease inception date	Sep. 01, 2025
Expiration date	Apr. 30, 2034