Other current assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Other current assets
Corporate tax receivable	$ 43,548	$ 30,773
Prepayments	10,450	9,043
Clinical materials	1,327	746
VAT receivable	3,495	2,482
Other current assets	1,874	2,082
Total	$ 60,694	$ 45,126