Initial capitalization - Acquisitions (Details) - USD ($) $ in Thousands		6 Months Ended
	Jun. 19, 2019	Jun. 30, 2022	Dec. 31, 2021	Jun. 21, 2019
Schedule of Capitalization [Line Items]
Cash and cash equivalents		$ 112,787	$ 56,445
Property and equipment		69,971	57,967
Other current assets			250
Current liabilities		(21,569)	$ (15,655)
IPR&D expense		$ 10,000
Prior Century's Assets
Schedule of Capitalization [Line Items]
Cash and cash equivalents				$ 25,163
IPR&D				225,946
Property and equipment				1,034
Other current assets				578
Other non-current assets				669
Current liabilities				(1,283)
Total				$ 252,107
IPR&D expense	$ 225,946