Stock-based compensation - Schedule of Service Vesting-Based Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2025 $ / shares shares
Options
Outstanding as of beginning of period (in shares) | shares	127,000
Exercised (in shares) | shares	(10,000)
Outstanding as of end of period (in shares) | shares	117,000
Stock options exercisable at end of period (in shares) | shares	117,000
Wtd. Avg. Exercise Price
Outstanding as of beginning of period (in dollars per share) | $ / shares	$ 2.19
Exercised (in dollars per share) | $ / shares	1.83
Outstanding as of end of period (in dollars per share) | $ / shares	2.22
Stock options exercisable at end of period (in dollars per share) | $ / shares	$ 2.22