Commitments and Contingencies - Additional Information (Detail)		3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($) ft²	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($) ft²	Dec. 31, 2024 USD ($)	Aug. 31, 2024	Apr. 30, 2022 ft²
Lessee, Lease, Description [Line Items]
Operating lease term							7 years 4 months 24 days
Amortization of operating right-of-use assets				$ 153,000	$ 188,000
Operating lease payments	$ 4,400,000
Weighted average remaining lease term	6 years 2 months 12 days	6 years 2 months 12 days		6 years 2 months 12 days
Weighted average discount rate percent	12.90%	12.90%		12.90%
Research And Development Agreements
Lessee, Lease, Description [Line Items]
Termination and cancellation charges payable	$ 0	$ 0		$ 0		$ 0
Indemnification Agreement
Lessee, Lease, Description [Line Items]
Termination and cancellation charges payable	0	0		0		$ 0
Purchase Commitments
Lessee, Lease, Description [Line Items]
Aggregate amount of future minimum purchase obligations	$ 11,600,000	11,600,000		11,600,000
Purchases under the purchase obligation				2,500,000	$ 500,000
Brisbane, California
Lessee, Lease, Description [Line Items]
Sublease agreement area | ft²			19,000		19,000			12,000
Security deposit			$ 86,000		$ 86,000
Lease For Corporate Office Facility
Lessee, Lease, Description [Line Items]
Amortization of operating right-of-use assets		$ 100,000	$ 100,000	$ 300,000	200,000
Operating lease payments					$ 200,000