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Supplementary Information (Tables)
 12 Months Ended
Dec. 31, 2023
Notes Tables  
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block]
   

As of December 31,

 

(Thousands of dollars)

  

2023

   

2022

 

Proved Developed oil and gas properties

   $ 659,792     $ 555,280  

Proved Undeveloped oil and gas properties

     —       —  

Total Capitalized Costs

     659,792       555,280  

Accumulated depreciation, depletion and valuation allowance

     (406,913

)

     (385,811 )

Net Capitalized Costs

   $ 252,879     $ 169,469  
Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block]
   

Years Ended December 31,

 

(Thousands of dollars)

  

2023

   

2022

 

Development Costs

   $ 110,700     $ 13,598  
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block]
   

As of December 31,

 

(Thousands of dollars)

  

2023

   

2022

 

Future cash inflows

   $ 1,219,605     $ 994,842  

Future production costs

     (437,408

)

     (378,160 )

Future development costs

     (213,823

)

     (95,746 )

Future income tax expenses

     (119,359

)

     (110,439 )

Future Net Cash Flows

     449,015       410,497  

10% annual discount for estimated timing of cash flows

     (170,967

)

     (165,961 )

Standardized Measure of Discounted Future Net Cash Flows

   $ 278,048     $ 244,536  
Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block]
   

Years Ended
December 31,

 

(Thousands of dollars)

  

2023

    

2022

 

Sales of oil and gas produced, net of production costs

   $ (107,742 )   $ (86,302 )

Net changes in prices and production costs

     (98,132 )     72,640  

Extensions, discoveries and improved recovery

     178,960       126,029  

Revisions of previous quantity estimates

     (3,877

)

     (10,902 )

Net change in development costs

     66,552       (2,814 )

Reserves sold

     (398

)

     (818 )

Reserves purchased

     —       —  

Accretion of discount

     24,454       13,581  

Net change in income taxes

     4,532       (8,435 )

Changes in production rates (timing) and other

     (30,836 )     5,751  

Net change

     33,512       108,730  

Standardized measure of discounted future net cash flow:

                

Beginning of year

     244,536       135,806  

End of year

   $ 278,048     $ 244,536  
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block]
   

As of December 31,

 
   

2023

   

2022

 
   

Oil
(MBbls)

   

NGL’s
(MBbls)

   

Gas
(MMcf)

   

Oil
(MBbls)

   

NGLs
(MBbls)

   

Gas
(MMcf)

 

Proved Developed Reserves:

                                                

Beginning of year

     4,143       2,497       22,277       5,386       2,882       23,902  

Extensions, discoveries and improved recovery

     843       467       2,391       99       74       464  

Revisions of previous estimates

     (1,101

)

     (515

)

     (4,796 )     (375 )     (37 )     1,309  

Converted from undeveloped reserves

     3,028       1,833       9,030       —       —       —  

Reserves sold

     (12

)

     —       (26 )     (28 )     (5 )     (73 )

Reserve purchased

     —       —       —       —       —       —  

Production

     (1,144

)

     (606

)

     (4,127

)

     (939 )     (417 )     (3,325 )

End of year

     5,757       3,676       24,749       4,143       2,497       22,277  

Proved Undeveloped Reserves:

                                                

Beginning of year

     3,028       1,833       9,030       —       —       —  

Extensions, discoveries and improved recovery

     6,254       5,156       24,470       3,028       1,833       9,030  

Revisions of previous estimates

     —       —       —       —       —       —  

Converted to developed reserves

     (3,028 )     (1,833 )     (9,030 )     —       —       —  

Reserves Sold

     —       —       —       —       —       —  

End of year

     6,254       5,156       24,470       3,028       1,833       9,030  

Total Proved Reserves at the End of the Year

     12,011       8,832       49,219       7,171       4,330       31,307  
Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]
   

Years Ended December 31,

 

(Thousands of dollars)

  

2023

   

2022

 

Revenue:

                

Oil and gas sales

   $ 107,742     $ 124,118  

Costs and Expenses:

                

Lease operating expenses

     39,004       37,816  

Depreciation, depletion and accretion

     31,660       28,068  

Income tax expense

     5,797       10,329  

Total Costs and Expenses

     76,461       76,213  

Results of Operations from Producing Activities (excluding corporate overhead and interest costs)

   $ 31,281     $ 47,905