Stockholders' equity (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Oct. 16, 2025	Oct. 31, 2025	Mar. 31, 2026	Dec. 31, 2025	Nov. 30, 2025	Jun. 30, 2025	May 31, 2025	Nov. 30, 2024
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)			300,000,000	300,000,000		300,000,000
Common stock, par value per share (in dollars per share)			$ 0.0001	$ 0.0001
At-The-Market
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net (in shares)	3,769,483
Price per share (in dollars per share)	$ 2.55
Issuance and sale of common stock	$ 9.4
Underwritten Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares issued in transaction (in shares)		21,895,000
Common stock, par value per share (in dollars per share)		$ 0.0001
Consideration received on transaction		$ 116.9
Total consideration received on transaction, potential expected		$ 341.7
Underwritten Offering | Pre-Funded Warrants
Subsidiary, Sale of Stock [Line Items]
Number of securities called by warrants or rights (in shares)		28,713,500
Exercise price of warrants or rights (in dollars per share)		$ 0.0001
Number of securities called by each warrant or right (in shares)		1
Underwritten Offering | Class A Warrants
Subsidiary, Sale of Stock [Line Items]
Number of securities called by warrants or rights (in shares)		50,608,500
Underwritten Offering | Class B Warrants
Subsidiary, Sale of Stock [Line Items]
Number of securities called by warrants or rights (in shares)		50,608,500
Underwritten Offering | Class A and Class B Warrants
Subsidiary, Sale of Stock [Line Items]
Exercise price of warrants or rights (in dollars per share)		$ 2.47
Number of securities called by each warrant or right (in shares)		1
Underwritten Offering | Pre-Funded Warrants And Class A and Class B Warrants
Subsidiary, Sale of Stock [Line Items]
Exercise price of warrants or rights (in dollars per share)		$ 2.4699
Maximum | At-The-Market
Subsidiary, Sale of Stock [Line Items]
Sale of stock, value authorized for sale					$ 400.0			$ 200.0
Common stock, shares authorized (in shares)							150,000,000
Maximum | At-The-Market | Common Stock
Subsidiary, Sale of Stock [Line Items]
Sale of stock, value authorized for sale					$ 125.0