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Income taxes - Components of Deferred Taxes (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets:      
Net operating loss carryforward $ 48,568,167 $ 41,058,034  
Stock compensation 4,130,337 4,051,018  
Amortization 21,883 39,412  
Capitalized research and development costs 3,386,699 4,850,529  
Fixed Assets 878 981  
Research and development credits 42,220   $ 42,220
Accrued Expenses 199,095 165,558  
Gross deferred tax assets 56,349,279 50,165,532  
Valuation allowance $ (56,349,279) $ (50,165,532)