Commitments and Contingencies - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) ft²	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Lessee Lease Description [Line Items]
Accrued expenses and other current liabilities		$ 21,293	$ 21,293	$ 23,462
Other non-current liabilities		7,302	7,302
Obligation to pay base rent		$ 181,723	$ 181,723
Weighted-average remaining lease term		9 years 8 months 12 days	9 years 8 months 12 days
Weighted-average incremental borrowing rate		11.40%	11.40%
Bothell, Washington
Lessee Lease Description [Line Items]
Square feet | ft²	79,565
Option to extend the lease term			with the option to extend the lease for up to three additional five-year terms.
Reimbursement of tenant improvements	$ 19,900
Optional additional tenant improvement allowance	$ 8,000
Optional additional tenant improvement allowance, interest rate	6.50%
Accrued expenses and other current liabilities		$ 300	$ 300
Other non-current liabilities		7,300	$ 7,300
Obligation to pay base rent	$ 68,800
Letter of credit	$ 1,600
Cambridge, Massachusetts and South San Francisco, California
Lessee Lease Description [Line Items]
Increase decrease in operating lease right-of-use assets		6,400
Increase decrease in operating lease right-of-use liabilities		$ 6,200