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Additional Balance Sheet Information
6 Months Ended
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Additional Balance Sheet Information
(3) Additional Balance Sheet Information:
Certain balance sheet amounts are comprised of the following:
 
(Thousands of dollars)
  
June 30,
2020
   
December 31,
2019
 
Accounts Receivable:
    
Joint interest billing
  $1,306   $3,339 
Trade receivables
   555    2,246 
Oil and gas sales
   3,141    7,284 
Tax refund receivable
   3,440    1,720 
Other
   993    189 
  
 
 
   
 
 
 
   9,435    14,778 
Less: Allowance for doubtful accounts
   (418   (418
  
 
 
   
 
 
 
Total
  $9,017   $14,360 
  
 
 
   
 
 
 
Accounts Payable:
    
Trade
  $2,923   $261 
Royalty and other owners
   3,889    4,227 
Partner advances
   853    1,024 
Other
   1,095    1,122 
  
 
 
   
 
 
 
Total
  $8,760   $6,634 
  
 
 
   
 
 
 
Accrued Liabilities:
    
Compensation and related expenses
  $2,609   $3,620 
Property costs
   1,331    2,829 
Other
       387 
  
 
 
   
 
 
 
Total
  $3,940   $6,836