Stock-based compensation - Restricted Stock - (Details) - Unvested restricted common stock units $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares
Shares
Balance, beginning (in shares) | shares	1,370,897
Awarded (in shares) | shares	1,010,208
Vested (in shares) | shares	(515,303)
Forfeited (in shares) | shares	(215,859)
Balance, ending (in shares) | shares	1,649,943
Weighted Average Grant Date Fair Value Per Share
Balance, beginning (in dollars per share) | $ / shares	$ 6.65
Granted (in dollars per share) | $ / shares	7.83
Vested (in dollars per share) | $ / shares	6.42
Forfeited (in dollars per share) | $ / shares	6.67
Balance, ending (in dollars per share) | $ / shares	$ 7.44
Restricted stock disclosures
Vesting period	3 years
Unrecognized stock-based compensation expense | $	$ 8.6
Remaining weighted-average remaining vesting period	1 year 6 months