Stock-based compensation - Stock option activity (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at the beginning of period -Options | shares	12,175
Granted - Options | shares	7,204
Exercised - Options | shares	(1,043)
Forfeited/expired - Options | shares	(4,861)
Outstanding at the ending of period -Options | shares	13,475
Outstanding-Weighted Average Exercise Price at the beginning of period - Options | $ / shares	$ 16.08
Granted-Weighted Average Exercise Price | $ / shares	23.24
Exercised-Weighted Average Exercise Price | $ / shares	22.77
Forfeited/expired-Weighted Average Exercise Price | $ / shares	22.77
Outstanding-Weighted Average Exercise Price at the ending of period - Options | $ / shares	$ 16.97
Outstanding-Weighted Average Remaining Contractual Life (Years)	1 year 6 months 3 days
Outstanding-Aggregate Intrinsic Value | $	$ 120,136