Stockholders' equity - Narrative (Details) $ / shares in Units, $ in Millions			3 Months Ended
	Feb. 11, 2026 $ / shares shares	Nov. 14, 2023	Mar. 31, 2026 USD ($) $ / shares shares	Dec. 31, 2025 USD ($) $ / shares shares
Class of Warrant or Right [Line Items]
Conversion ratio		0.1
2025 2-Year Warrants
Class of Warrant or Right [Line Items]
Number of warrants exercised (in shares)			6,779,910
Warrants, exercise price (in dollars per share) | $ / shares			$ 6.000	$ 6.000
Proceeds from warrant exercises | $			$ 40.7
2025 3-Year Warrants
Class of Warrant or Right [Line Items]
Number of warrants exercised (in shares)			661,483
Warrants, exercise price (in dollars per share) | $ / shares			$ 4.200	4.200
Proceeds from warrant exercises | $			$ 2.8
Private Placement Offering Warrants
Class of Warrant or Right [Line Items]
Number of warrants exercised (in shares)	10,008,240
Warrants, exercise price (in dollars per share) | $ / shares	$ 1.0680		$ 1.068	$ 1.068
Number of securities called by warrants (in shares)	1,000,824
Number of securities called by each warrant (in shares)			0.1
Share price, ten day average (in dollars per share) | $ / shares	$ 45.41
Common stock issued (in shares)	765,440
5-Year Public Warrants
Class of Warrant or Right [Line Items]
Number of securities called by each warrant (in shares)				0.1
New At-The-Market Offering
Class of Warrant or Right [Line Items]
Shares available for issuance under the plan | $			$ 92.1	$ 92.1