Leases - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($) ft²	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($) ft²	Dec. 31, 2024	Sep. 30, 2021 USD ($) ft²	May 31, 2021 ft²
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 2,200	$ 2,200	$ 7,000	$ 6,800
Variable lease cost	$ 1,600	1,600	$ 5,400	5,500
Weighted average remaining lease term of operating leases	5 years		5 years		5 years 8 months 12 days
Operating lease, weighted average discount rate (as a percent)	8.50%		8.50%		8.50%
Long-lived asset impairment charges	$ 0	$ 0	$ 1,443	$ 0
Related Party
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²						18,000
Related Party | Sonoma
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²						18,000
Tenant improvements						$ 4,600
Operating lease, renewal term	5 years		5 years
South San Francisco, California
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²		12,150		12,150			11,000