Licensing arrangements (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Product development and regulatory approval milestone payments		$ 2.6
Commercial milestone payments		1.5
Collaborative agreement, milestone payments made		0.1	$ 0.0
2021 Patent License Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Certain regulatory, developmental, and commercial milestone payables	$ 2.2
License fee payment		$ 0.1	$ 0.1