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Revenue - Grant Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |  |  |
Grant income | $ 250 | $ 250 | $ 500 | $ 500 |
Grant income |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Grant income |  |  |  |  | $ 2,000
Period of recognition of grant (in years) |  |  |  |  | 2 years

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