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Additional Balance Sheet Information (Tables)
9 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of Balance Sheet Amounts

Certain balance sheet amounts are comprised of the following:

 

(Thousands of dollars)    September 30,
2018
     December 31,
2017
 

Accounts Receivable:

     

Joint interest billing

   $ 1,873      $ 3,173  

Trade receivables

     2,207        941  

Oil and gas sales

     10,456        12,941  

Other

     361        4  
  

 

 

    

 

 

 
     14,897        17,059  

Less: Allowance for doubtful accounts

     (98      (98
  

 

 

    

 

 

 

Total

   $ 14,799      $ 16,961  
  

 

 

    

 

 

 

Accounts Payable:

     

Trade

   $ 1,153      $ 14,317  

Royalty and other owners

     7,944        8,341  

Prepaid drilling deposits

     114        67  

Other

     1,404        1,890  
  

 

 

    

 

 

 

Total

   $ 10,615      $ 24,615  
  

 

 

    

 

 

 

Accrued Liabilities:

     

Compensation and related expenses

   $ 2,387      $ 2,449  

Property costs

     12,092        9,141  

Income Tax

     —          4,180  

Other

     785        524  
  

 

 

    

 

 

 

Total

   $ 15,264      $ 16,294