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Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue
Revenues	$ 6,883	$ 2,357	$ 4,651
Contract assets	0	0
Contract liability	3,058	60
Revenue, contract liabilities	100
Contracts and grants
Revenue
Revenues	6,605	2,301	4,620
Rockefeller | Contracts and grants
Revenue
Revenues	6,600	1,800	4,100
National Institute of Health | Contracts and grants
Revenue
Revenues	$ 0	$ 500	$ 400

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