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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 |  |  |  |

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