Stockholders' equity - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Options Outstanding
Vested & exercisable, awards outstanding (in shares)	50,000
2021 Stock incentive Plan
Options Outstanding
Outstanding, beginning balance (in shares)	1,351,086
Granted (in shares)	0	0	0
Exercised (in shares)	(364,669)
Canceled (in shares)	(95,509)
Outstanding, ending balance (in shares)	890,908	1,351,086
Vested & exercisable, awards outstanding (in shares)	890,908
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 5.28
Granted (in dollars per share)	0
Exercised (in dollars per share)	3.56
Canceled (in dollars per share)	6.61
Outstanding, ending balance (in dollars per share)	5.84	$ 5.28
Vested & exercisable, Weighted Average Exercise Price (in dollars per share)	$ 5.84
Outstanding, weighted average remaining contractual term (in years)	3 years 7 months 9 days	4 years 18 days
Vested & exercisable, Weighted Average Remaining Contractual Term	3 years 7 months 9 days
Outstanding, aggregate intrinsic value	$ 1,174	$ 4,666
Vested & exercisable, Aggregate Intrinsic Value	$ 1,174
Amended and Restated 2010 Equity Incentive Plan | Performance-Based Awards
Options Outstanding
Outstanding, beginning balance (in shares)	50,000
Granted (in shares)	0
Exercised (in shares)	0
Canceled (in shares)	0
Outstanding, ending balance (in shares)	50,000	50,000
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 3.06
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Canceled (in dollars per share)	0
Outstanding, ending balance (in dollars per share)	3.06	$ 3.06
Vested & exercisable, Weighted Average Exercise Price (in dollars per share)	$ 3.06
Outstanding, weighted average remaining contractual term (in years)	2 years 6 months 29 days	3 years 6 months 29 days
Vested & exercisable, Weighted Average Remaining Contractual Term	2 years 6 months 29 days
Outstanding, aggregate intrinsic value	$ 140	$ 259
Vested & exercisable, Aggregate Intrinsic Value	$ 140