Leases - Additional Information (Details)		1 Months Ended				3 Months Ended		6 Months Ended
	Jan. 31, 2024 ft²	Apr. 30, 2022	Dec. 31, 2021 USD ($) ft²	Mar. 31, 2021 ft²	Sep. 30, 2020 USD ($) ft²	Jun. 30, 2024 USD ($) ft²	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) ft²	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Lessee Lease Description [Line Items]
Operating leases cancellable and non-cancellable expiration dates								2032
Operating leases Noncancelable expiration dates								2026
Total lease cost						$ 3,200,000	$ 2,800,000	$ 5,900,000	$ 5,800,000
Operating lease cost						2,400,000	1,900,000	4,300,000	3,800,000
Variable lease costs						918,000	$ 859,000	1,800,000	2,000,000
Cash paid for operating leases								4,100,000	$ 2,600,000
Sublease income						$ 132,000		$ 216,000
Operating lease, weighted-average remaining lease term						7 years 9 months 21 days		7 years 9 months 21 days		8 years 3 months 14 days
Operating lease, weighted-average discount rate						8.96%		8.96%		8.95%
Operating lease, aggregate monthly payments to lessor						$ 76,194,000		$ 76,194,000
Letter of credit provided to lessor						408,000		408,000		$ 408,000
Noncash impairment charge								$ 4,653,000
2020 Lease
Lessee Lease Description [Line Items]
Office space leases | ft²					59,407
Lease commencement month and year					2021-08
Operating lease initial term					10 years 9 months
Operating lease, aggregate monthly payments to lessor					$ 51,600,000
Tenant improvement allowance					$ 16,800,000
Term for cancellation of lease					84 months
Notice period for cancellation of lease					12 months
Operating lease cancellation payment					$ 2,500,000
2020 Lease | Letter of Credit
Lessee Lease Description [Line Items]
Letter of credit provided to lessor					$ 408,000
Line of credit facility, expiration date					Jul. 29, 2032
First Amendment to 2020 Lease
Lessee Lease Description [Line Items]
Office space leases | ft²				18,421
Lease commencement month and year		2022-05		2022-02
2021 Lease
Lessee Lease Description [Line Items]
Office space leases | ft²			29,542
Lease commencement month and year			2022-07
Operating lease initial term			124 months
Operating lease option to extend								5 years
Operating lease existence of option to extend [true false]								true
Operating lease, aggregate monthly payments to lessor			$ 34,400,000
Tenant improvement allowance			8,200,000
Prepaid rent						$ 5,100,000		$ 5,100,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]						Operating Lease, Right-of-Use Asset		Operating Lease, Right-of-Use Asset
2021 Lease | Other Assets
Lessee Lease Description [Line Items]
Security deposit paid			$ 874,000
2024 Lease
Lessee Lease Description [Line Items]
Sublease income						$ 132,000		$ 216,000
Office space leases | ft²	10,000					18,421		18,421
Lessor, Operating lease initial term	3 years					61 months		61 months
Lessor, Operating lease existence of option to extend [true false]	true
Lessor, Operating lease existence of option to terminate [true false]	true
Lease discount rate						13.50%		13.50%
Noncash impairment charge						$ 4,700,000		$ 4,700,000
Operating lease assets impairment						2,400,000		2,400,000
Leasehold improvements and furniture impairment						2,300,000		2,300,000
2024 Lease | Research and Development Expense
Lessee Lease Description [Line Items]
Noncash impairment charge						3,000,000		3,000,000
2024 Lease | General and Administrative Expense
Lessee Lease Description [Line Items]
Noncash impairment charge						$ 1,700,000		$ 1,700,000