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Income taxes (Tables)
12 Months Ended
Dec. 31, 2022
Income Tax Disclosure [Abstract]  
Schedule of effective tax rate
         
   2022   2021 
Federal statutory rates  $(1,034,596)  $(673,266)
State income taxes   (435,516)   (283,413)
Foreign income taxes   (129,904)   (857)
Permanent differences   (86)   (3,439)
Valuation allowance against net deferred tax assets   1,600,102    960,975 
Effective rate  $   $ 
Schedule of deferred tax assets and liabilities
         
   2022   2021 
Deferred income tax asset          
Net operating loss carryforwards  $5,261,884   $3,661,868 
Interest   43,786    43,700 
Total deferred income tax asset   5,305,670    3,705,568 
Less: valuation allowance   (5,305,670)   (3,705,568)
Total deferred income tax asset  $   $