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Accounts Payable (Tables)
12 Months Ended
Dec. 31, 2019
Payables and Accruals [Abstract]  
Accounts Payable
   December 31,
   2019  2018
       
Trade payables  $2,271,000   $2,166,000 
Production proceeds payable   3,341,000    3,016,000 
Prepaid drilling costs   393,000    675,000 
   $6,005,000   $5,857,000