Stock-based compensation - Schedule of Service Vesting-Based Stock Option Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Options
Outstanding as of beginning of period (in shares)	117,000	127,000
Exercised (in shares)	(100,000)	0
Outstanding as of end of period (in shares)	17,000	127,000
Stock options exercisable at end of period (in shares)	17,000	127,000
Wtd. Avg. Exercise Price
Outstanding as of beginning of period (in dollars per share)	$ 2.22	$ 2.19
Exercised (in dollars per share)	1.90	0
Outstanding as of end of period (in dollars per share)	4.08	2.19
Stock options exercisable at end of period (in dollars per share)	$ 4.08	$ 2.19