Loss per share - Schedule of diluted net loss per share attributable to common stockholders (Details) - shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common stock equivalents (in shares)	119,973,066	17,179,088
Class A Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common stock equivalents (in shares)	50,608,500	0
Class B Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common stock equivalents (in shares)	50,608,500	0
Options to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common stock equivalents (in shares)	12,700,875	13,893,266
Restricted stock units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common stock equivalents (in shares)	6,055,191	3,285,822