Stockholders' equity - Summary of Stock Option Activity (Details) - 2021 Stock incentive Plan $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares
Options Outstanding
Outstanding, beginning balance (in shares) | shares	1,351,086
Granted (in shares) | shares	0
Exercised (in shares) | shares	(180,949)
Canceled (in shares) | shares	(83,629)
Outstanding, ending balance (in shares) | shares	1,086,508	1,351,086
Vested & expected to vest, awards outstanding (in shares) | shares	1,086,508
Exercisable, awards outstanding (in shares) | shares	1,086,201
Weighted Average Exercise Price
Outstanding, beginning balance (in USD per share) | $ / shares	$ 5.28
Granted (in USD per share) | $ / shares	0
Exercised (in USD per share) | $ / shares	4.01
Canceled (in USD per share) | $ / shares	6.67
Outstanding, ending balance (in USD per share) | $ / shares	5.38	$ 5.28
Vested & expected to vest, weighted average exercise price (in USD per shares) | $ / shares	5.38
Exercisable, weighted average exercise price (in USD per share) | $ / shares	$ 5.38
Outstanding, weighted average remaining contractual term	3 years 8 months 23 days	4 years 18 days
Outstanding, aggregate intrinsic value | $	$ 2,561	$ 4,666
Vested & expected to vest, weighted average remaining contractual term	3 years 8 months 23 days
Vested & expected to vest, aggregate intrinsic value | $	$ 2,561
Exercisable, weighted average remaining contractual term	3 years 8 months 23 days
Exercisable, aggregate intrinsic value | $	$ 2,561