Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands, € in Millions, £ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) region	Jun. 30, 2022 EUR (€) region	Jun. 30, 2022 GBP (£) region	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Jan. 01, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of geographic regions | region			2	2	2
Foreign exchange gains (losses)	$ (1,958)	$ 550	$ (3,291)			$ 1,193
Operating lease right-of-use assets	3,087		3,087				$ 3,696	$ 1,000
Operating lease liabilities - current	$ 2,169		$ 2,169				$ 2,235	$ 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)			33.35%	33.35%	33.35%
Total aid claimable | €				€ 7.5
United Kingdom Research and Development Tax Credit Regime
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash rebate percent (in percent)			21.67%	21.67%	21.67%
Annual offset amount | £					£ 5.0
Percentage of taxable profits (in percent)			50.00%	50.00%	50.00%