Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands, € in Millions, £ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) region	Mar. 31, 2022 EUR (€) region	Mar. 31, 2022 GBP (£) region	Mar. 31, 2021 USD ($)	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)	$ (1,333)			$ 643
Operating lease right-of-use assets	3,056				$ 3,696	$ 1,000
Operating lease liabilities - current	$ 2,146				$ 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%