Stockholders' equity - Common and preferred stock (Details)	Dec. 31, 2025 vote shares	Dec. 31, 2024 shares
Equity [Abstract]
Common stock, outstanding (in shares)	83,025,384	24,875,587
Common stock, issued (in shares)	83,025,384	24,875,587
Number of votes per share (in votes) | vote	1
Preferred stock, outstanding (in shares)	0
Preferred stock, issued (in shares)	0