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OTHER LONG-TERM LIABILITIES (Tables)
 12 Months Ended
Dec. 31, 2019
OTHER LONG-TERM LIABILITIES.  
Schedule of Other Long-Term Liabilities and Deferred Credits

 

 

 

 

 

 

 

 

 

December 31,

 

    

2019

    

2018

 

 

(thousands of dollars)

Royalties payable (1)

 

$

500

 

$

500

 

 

$

500

 

$

500

(1)Royalties payable were derived during prior years of production. Liabilities do not accrue interest or have a stated maturity date.