Employee benefit plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Defined contribution plan, employer matching contribution, percent of employees' gross pay	100.00%
Defined contribution plan, employer discretionary contribution amount	$ 1.1	$ 1.0	$ 0.8