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Summary of Significant Accounting Policies - Narrative (Details) £ in Thousands, $ in Thousands, € in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2023 USD ($) region | Mar. 31, 2023 EUR (€) region | Mar. 31, 2023 GBP (£) region | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | Jan. 01, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Number of geographic regions | region | 2 | 2 | 2 |  |  |
Expected dividend yield (in percent) | 0.00% | 0.00% | 0.00% | 0.00% |  |
Operating lease right-of-use assets | $ 1,593 |  |  |  | $ 2,006 |
Operating lease liabilities - current | 1,112 |  |  |  | $ 1,510 |
Foreign exchange gains | $ 2,685 |  |  | $ 1,333 |  |
Maximum qualifying research and development expenditures with connected parties (in percent) | 15.00% | 15.00% | 15.00% |  |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |  | $ 1,000
Operating lease liabilities - current |  |  |  |  |  | $ 1,000
United Kingdom Research and Development Tax Credit Regime, Small or Medium-Sized Enterprises (SME) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Cash rebate percent (in percent) | 33.30% | 33.30% | 33.30% |  |  |
Total aid claimable (in euros) | € |  | € 7.5 |  |  |  |
Cap on payable claims (in GBP) | £ |  |  | £ 20 |  |  |
United Kingdom Research and Development Tax Credit Regime |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Cash rebate percent (in percent) | 21.70% | 21.70% | 21.70% |  |  |
Annual offset amount (in euros) | £ |  |  | £ 5,000 |  |  |
Percentage of taxable profits (in percent) | 50.00% | 50.00% | 50.00% |  |  |

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