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Note 5 - Accounts Payable and Accrued Expenses
6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
5.
ACCOUNTS PAYABLE AND ACCRUED EXPENSES
 
As of
June 30, 2017
and
December 31, 2016,
the accounts payable and accrued expenses consisted of the following:
 
   
June 30
,
   
December 31,
 
   
2017
   
2016
 
                 
Drilling work payable
  $
151,028
    $
144,542
 
Accounts payable
   
4,822,282
     
4,601,938
 
Interest payable
   
2,956,986
     
2,554,312
 
Total accounts payable and accrued expenses
  $
7,930,296
    $
7,300,792