Leases - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026 USD ($) ft²	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) ft²	Jun. 30, 2025 USD ($)	Dec. 31, 2025	Sep. 30, 2024 ft²	Sep. 30, 2021 USD ($) ft²	May 31, 2021 ft²
Lessee, Lease, Description [Line Items]
Operating lease cost | $	$ 2,000	$ 2,400	$ 4,100	$ 4,800
Variable lease cost | $	$ 1,500	1,900	$ 3,000	3,800
Weighted average remaining lease term of operating leases (in years)	4 years 3 months 18 days		4 years 3 months 18 days		4 years 9 months 18 days
Operating lease, weighted average discount rate (as a percent)	8.50%		8.50%		8.50%
Impairment of long-lived assets | $	$ 0	$ 1,443	$ 0	$ 1,443
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
South San Francisco, California
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²						12,150		11,000
South San Francisco, California | Related Party | Sonoma
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²	3,600		3,600