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Commitments and Contingencies - Narrative (Details) $ in Millions | 1 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2019 ft² renewal | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 ft² | Jul. 31, 2020 USD ($) | Oct. 31, 2018 USD ($) ft² | Aug. 31, 2018 ft²
Operating Leased Assets [Line Items] |  |  |  |  |  |  |
Area of office and laboratory (in square feet) | ft² |  |  |  |  |  | 14,943 | 68,000
Operating lease term |  |  |  |  |  | 124 months | 127 months
Operating lease, option to extend term (in years) |  |  |  |  |  | 7 years | 7 years
Tenant improvements |  | $ 5.0 |  |  |  |  |
Additional area of office and laboratory (in square feet) | ft² |  |  |  | 47,566 |  |  |
Allowance for tenant improvements |  |  |  |  |  | $ 0.8 |
Letter of credit |  | 6.0 | $ 6.0 |  |  |  |
Cash paid for amounts included in measurement of lease liabilities |  | $ 9.0 |  |  |  |  |
Weighted average discount rate (as a percent) |  | 6.89% |  |  |  |  |
Weighted average remaining lease term (in years) |  | 9 years 3 months 7 days |  |  |  |  |
Agreement term |  |  |  |  | 20 years |  |
Termination payment |  |  |  |  | $ 4.3 |  |
Non-cancellable purchase commitments |  | $ 4.0 |  |  |  |  |
Lease One, Amended |  |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |  |
Operating lease term |  |  |  | 120 months |  |  |
Operating lease, option to extend term (in years) |  |  |  | 8 years |  |  |
Lease Two |  |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |  |
Operating lease, option to extend term (in years) |  |  |  | 8 years |  |  |
Letter of Credit |  |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |  |
Letter of credit |  | 4.3 | $ 4.3 |  |  |  |
Newark |  |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |  |
Operating lease term | 188 months |  |  |  |  |  |
Operating lease, option to extend term (in years) | 10 years |  |  |  |  |  |
Area of operating lease (in square feet) | ft² | 118,000 |  |  |  |  |  |
Number of options to extend lease | renewal | 2 |  |  |  |  |  |
Tenant improvement allowance utilized to date |  | $ 3.0 |  |  |  |  |

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