Accounts payable and accrued expenses - Summary of the components of accounts payable and accrued expenses (Details) - USD ($) |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Accounts payable and accrued expenses [Line Items] | |||
| Accounts payable | $ 15,353 | ||
| OHB Pediatrics Ltd [Member] | |||
| Accounts payable and accrued expenses [Line Items] | |||
| Accounts payable | 2,501,000 | $ 168,000 | $ 117,000 |
| Accrued clinical | 2,977,000 | 553,000 | |
| Accrued consulting | 553,000 | 0 | |
| Accrued bonus | 175,000 | 422,000 | 0 |
| Accrued legal | 887,000 | 364,000 | 113,000 |
| Accrued other | 490,000 | 21,000 | 0 |
| Total accounts payable and accrued expenses | $ 7,030,000 | $ 1,528,000 | $ 230,000 |