Commitments and contingencies (Details) $ in Millions	Dec. 31, 2023 USD ($)	Oct. 23, 2023 lawsuit	Dec. 31, 2022 USD ($)	Oct. 31, 2022 USD ($)	Oct. 31, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Committed purchase orders | $	$ 8.3		$ 9.5	$ 9.2	$ 6.9
Number of shareholder lawsuits | lawsuit		3