Stock-based compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 07, 2024	Mar. 31, 2026
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted (in shares)		76,780
Stock options granted, weighted average exercise price (in dollars per share)		$ 1.88
Stock options granted, weighted average grant date fair value (in dollars per share)		$ 1.50
2020 Stock Option and Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted, weighted average exercise price (in dollars per share)	$ 22.00
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs		$ 10.2
Expected to be recognized over a weighted average period		2 years
Performance-Accelerated Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs		$ 2.9
Expected to be recognized over a weighted average period		2 years 10 months 24 days
Number of shares authorized (in shares)		1,588,140
Units vested (in shares)		0
Share-based compensation, number of common stock issuable per RSU vested (in shares)		1
Restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs		$ 11.8
Expected to be recognized over a weighted average period		2 years 8 months 12 days
Units vested (in shares)		712,681
Granted (in shares)		2,829,710
Share-based compensation, number of common stock issuable per RSU vested (in shares)		1
Number of shares retained to cover statutory minimum withholding taxes (in shares)		105,756
Shares outstanding (in shares)		4,467,051