Summary of significant accounting policies - Inventory (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounting Policies [Abstract]
Raw materials	$ 1,121		$ 952
Work in progress	22,178		17,991
Finished goods	6,759		11,634
Total inventory	30,058		$ 30,577
Inventory write-down	$ 3,700	$ 100