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Balance sheet components (Schedule of accrued expenses and other current liabilities) (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Balance Sheet Components [Abstract]    
Accrued legal fees $ 553,835 $ 495,016
Accrued compensation and benefits 89,701 140,989
Accrued other 418,504 126,830
Accrued expenses and other current liabilities $ 1,062,040 $ 762,835