Stock-based compensation - Summary of RSU activity (Details)	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Restricted stock units
Shares
Outstanding, beginning balance (in shares)	154,000
Granted (in shares)	0
Vested (in shares)	(56,000)
Forfeited (in shares)	0
Outstanding, ending balance (in shares)	98,000
Weighted-Average Grant Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 19.47
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	21.74
Forfeited (in dollars per share) | $ / shares	0
Outstanding, ending balance (in dollars per share) | $ / shares	$ 18.17
Number of shares retained to cover statutory minimum withholding taxes	17,694
Time-Based Restricted Stock Units
Shares
Outstanding, beginning balance (in shares)	750,210
Granted (in shares)	1,090,150
Vested (in shares)	(161,862)
Forfeited (in shares)	(173,209)
Outstanding, ending balance (in shares)	1,505,289
Weighted-Average Grant Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 5.35
Granted (in dollars per share) | $ / shares	7.22
Vested (in dollars per share) | $ / shares	5.29
Forfeited (in dollars per share) | $ / shares	6.19
Outstanding, ending balance (in dollars per share) | $ / shares	$ 6.61