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Note 5 - Other Long-Term Obligations and Commitments (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

(Thousands of dollars)

 

Operating
Leases

 
         

2024

    275  

2025

    45  

Total undiscounted lease payments

  $ 320  

Less: Amount associated with discounting

    (36

)

Total net operating lease liabilities

  $ 284  

Less: Current portion included in Current portion of Asset Retirement and Other Long-Term Obligations

    246  

Non-current portion included in Other Long-Term Obligations

  $ 38  
Schedule of Change in Asset Retirement Obligation [Table Text Block]
   

Years Ended
December 31,

 

(Thousands of dollars)

 

2023

   

2022

 

Asset retirement obligation at beginning of period

  $ 15,443     $ 14,295  

Net wells placed on production

    254       11  

Liabilities settled

    (2,706

)

    (1,407

)

Dispositions

    (1,161

)

    (344

)

Accretion expense

    684       667  

Revisions in estimated liabilities

    2,639       2,221  

Asset retirement obligation at end of period

  $ 15,153     $ 15,443  

Less: Current portion included in Current portion of asset retirement and other long-term obligations

    446       1,918  

Long-term Asset Retirement Obligations included in Asset Retirement Obligations

  $ 14,707     $ 13,525