Employee benefit plan (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) hour	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Retirement Benefits [Abstract]
Eligible age to participate	21 years
Minimum number of hours for eligibility | hour	1,000
Maximum contribution by employee (as a percent)	95.00%
Percentage employer matches of the employee's percentage contribution matched	100.00%	100.00%	100.00%
Employer matching contribution (as a percent)	4.00%	4.00%	4.00%
Employer match, amount	$ 7
Employee benefit expenses	$ 800	$ 1,300	$ 1,100