Stock-based compensation - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Number of Options
Beginning balance, outstanding (in shares)			3,560,144
Granted (in shares)	0	0	0	0
Exercised (in shares)	0		0
Cancelled/Forfeited (in shares)			(206,182)
Ending balance, outstanding (in shares)	3,353,962		3,353,962		3,560,144
Options exercisable (in shares)	3,141,587		3,141,587
Options vested and expected to vest (in shares)	3,353,962		3,353,962
Weighted-Average Exercise Price
Beginning balance, outstanding (in dollars per share)			$ 7.09
Granted (in dollars per share)			0
Exercised (in dollars per share)			0
Cancelled/Forfeited (in dollars per share)			5.81
Ending balance, outstanding (in dollars per share)	$ 7.17		7.17		$ 7.09
Options exercisable (in dollars per share)	7.15		7.15
Options vested and expected to vest (in dollars per share)	$ 7.17		$ 7.17
Weighted Average Remaining Contractual Term
Outstanding			4 years 4 months 24 days		4 years 10 months 24 days
Options exercisable			4 years 3 months 18 days
Options vested and expected to vest			4 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding	$ 0		$ 0		$ 0
Options exercisable	0		0
Options vested and expected to vest	$ 0		$ 0