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Balance sheet components (Schedule of prepaid expenses) (Details) - USD ($) | Jun. 30, 2026 | Dec. 31, 2025
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Balance Sheet Components [Abstract] |  |
Insurance | $ 109,405 | $ 345,084
Contract research organizations | 390,000 | 410,000
Professional services | 330,400 | 300,033
Prepaid services | 977,656 | 31,004
Prepaid expenses | $ 1,807,461 | $ 1,086,121

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