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Additional Balance Sheet Information (Tables)
9 Months Ended
Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of Balance Sheet Amounts
Certain balance sheet amounts are comprised of the following:
 
 
  
September 30,
 
  
December 31,
 
(Thousands of dollars)
  
2020
 
  
2019
 
Accounts Receivable:
    
Joint interest billing
  $1,692   $3,339 
Trade receivables
   1,188    2,246 
Oil and gas sales
   2,344    7,284 
Tax refund receivable
       1,720 
Other
   481    189 
    
 
 
 
   5,705    14,778 
Less: Allowance for doubtful accounts
   (418   (418
  
 
 
   
 
 
 
Total
  $5,287   $14,360 
  
 
 
   
 
 
 
Accounts Payable:
    
Trade
  $519   $261 
Royalty and other owners
   3,735    4,227 
Partner advances
   1,180    1,024 
Other
   762    1,122 
Total
  $6,196   $6,634 
  
 
 
   
 
 
 
Accrued Liabilities:
    
Compensation and related expenses
  $3,968   $3,620 
Property costs
   1,556    2,829 
Other
   19    387 
Total
  $5,543   $6,836