Defined contribution plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Defined Contribution Plan Disclosure [Line Items]
Pre-tax compensation of employees	90.00%
Percentage of employer discretion contribution	100.00%
Defined contribution plan, employer matching contribution, percent of match	3.00%
Defined contribution plan, employer matching contribution, additional percent of employees' gross pay	50.00%
Defined contribution plan, employer matching contribution, additional percent of match	5.00%
Employer discretionary contribution amount	$ 0.9	$ 1.1
Maximum
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match	4.00%