Commitments, contingencies, and other liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) multiple	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2017 USD ($)
Other current liabilities
Lease liability		$ 5,940	$ 3,200
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]		Total other current liabilities	Total other current liabilities
Total other current liabilities		$ 5,940	$ 3,200
Other non-current liabilities
Lease liability		$ 41,995	$ 17,093
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]		Total other non-current liabilities	Total other non-current liabilities
Other		$ 1,001	$ 1,001
Total other non-current liabilities		$ 42,996	$ 18,094
Non-profit organization agreement
Other non-current liabilities
Maximum funding	$ 4,000
Funding multiple | multiple	2.6
Milestone payment liability				$ 1,000