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Earnings per share - Summary of Anti-dilutive Shares Excluded from Calculation of Diluted Net Loss per Share (Parenthetical) (Details) - shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	211,161,814	29,039,570
Warrants issued	2,753,246
Common stock outstanding	75,744,576		47,609,899
Common stock issued	75,799,241		47,664,564
Series A Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	4,504,824	6,669,742
Series A-2 Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock outstanding	28,380	42,019
Common stock issued	28,380	42,019
Public Warrants [Member] \| Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	575,000
Private Placement Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Warrants issued	850,119
Outstanding warrants	20,860		20,860	20,860
Private Placement Warrants [Member] \| Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	20,860
Ladenburg Agreement [Member] \| Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	30,000
PIPE Private Placement Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Warrants issued	736,337				736,337
Placement Agent Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Warrants issued	21,091				21,091
Preferred Tranche C Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Outstanding warrants	107,115		107,115	107,115
Common stock issued	17,002,381
Release Date Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	50,000,000
Enrollment Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	98,300,000