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Accrued liabilities (Tables)
3 Months Ended
Mar. 31, 2022
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities

Accrued liabilities consist of the following at March 31, 2022 and December 31, 2021:

 

   March 31, 2022   December 31, 2021 
Accrued rent  $614,918   $614,918 
Accrued Nicaragua Concession fees   544,485    544,485 
           
Total accrued liabilities  $1,159,403   $1,159,403