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Leases - Additional Information (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2023 USD ($) | May 31, 2021 ft² | Apr. 30, 2021 USD ($) | Oct. 31, 2020 | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2022
Lessee Lease Description [Line Items] |  |  |  |  |  |  |  |  |
Sublease rent income |  |  |  |  |  | $ 134 | $ 134 | $ 403 |
Variable lease expense |  |  |  |  | $ 152 | 130 | $ 400 | 393 |
Weighted-average remaining lease term | 4 years 7 months 6 days |  |  |  | 4 years 7 months 6 days |  | 4 years 7 months 6 days |  | 5 years 3 months 18 days
Weighted-average discount rate | 7.87% |  |  |  | 7.87% |  | 7.87% |  | 7.86%
Cash paid for measurement of lease liabilities |  |  |  |  |  |  | $ 800 |  |
Arsenal Way Lease |  |  |  |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |  |  |  |
Lessee, operating lease, commencement month and year |  |  | 2021-04 |  |  |  |  |  |
Lessee operating lease, renewal term |  |  | 5 years |  |  |  |  |  |
Lessee, operating lease, initial term |  |  | 7 years |  |  |  |  |  |
Lessee, operating lease, option to extend |  |  |  |  |  |  | The lease has an initial term from the rent commencement date, which is a month after the lease commencement date, of approximately seven years, with an option to extend the term for an additional five years at then-market rental rates. |  |
Lessee, Operating Lease, Existence of Option to Extend [true false] |  |  | true |  |  |  |  |  |
Letter of credit |  |  | $ 300 |  |  |  |  |  |
Tenant improvements cost |  |  | 700 |  |  |  |  |  |
Base rent |  |  | $ 1,000 |  |  |  |  |  |
Annual rent increase percentage |  |  | 3.00% |  |  |  |  |  |
Rentable square feet | ft² |  | 6,330 |  |  |  |  |  |  |
Sublease expiration, month and year |  | 2023-03 |  |  |  |  |  |  |
Sublease rent income |  |  |  |  |  | $ 200 | $ 200 | $ 600 |
Lund, Sweden |  |  |  |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |  |  |  |
Lessee, operating lease, commencement month and year |  |  |  | 2020-10 |  |  |  |  |
Lessee, operating lease, expiration month and year |  |  |  | 2023-09 |  |  |  |  |
Lessee, operating lease, lease not yet commenced, initial term | 3 years |  |  |  | 3 years |  | 3 years |  |
Lessee, operating lease, lease not yet commenced, option to extend [true false] | true |  |  |  |  |  |  |  |
Lessee, operating lease, lease not yet commenced, renewal term | 3 years |  |  |  | 3 years |  | 3 years |  |
Aggregate estimated undiscounted rental payments | $ 500 |  |  |  |  |  |  |  |
Lessee operating lease, renewal term |  |  |  | 3 years |  |  |  |  |
Lessee, Operating Lease, Existence of Option to Extend [true false] |  |  |  | true |  |  |  |  |

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