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Balance sheet components (Schedule of accrued expenses and other current liabilities) (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Balance Sheet Components [Abstract]    
Accrued legal fees $ 291,476 $ 352,864
Accrued compensation and benefits 248,910 300,181
Accrued other 498,346 342,245
Accrued expenses and other current liabilities $ 1,038,731 $ 995,290