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Note 8 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   

Years Ended
December 31,

 

(Thousands of dollars)

 

2024

   

2023

 

Current:

               

Federal

  $ 8,545     $ (891 )

State

    1,055       (258 )

Total current

    9,600       (1,149 )

Deferred:

               

Federal

    6,080       6,544  

State

    89       724  

Total deferred

    6,169       7,268  

Total income tax provision

  $ 15,769     $ 6,119  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   

At December 31,

 

(Thousands of dollars)

 

2024

   

2023

 

Deferred Tax Assets:

               

Accrued liabilities

  $ 279     $ 349  

Allowance for credit losses

    93       154  

Partnership basis difference

    114       106  

State Net operating loss carry-forwards

    212       278  

Total deferred tax assets

    698       887  

Deferred Tax Liabilities:

               

Depletion and depreciation

    54,103       48,123  

Total deferred tax liabilities

    54,103       48,123  

Net deferred tax liabilities

  $ 53,405     $ 47,236  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   

Years Ended
December 31,

 

(Thousands of dollars)

 

2024

   

2023

 

Expected tax expense

  $ 14,946     $ 7,187  

Permanent differences

    880       221  

State income tax, net of federal benefit

    834       204  

Provision to return adjustment

    (679

)

    (1,534 )

Tax credits

    (599 )     0  

Other, net

    387       41  

Total income tax provision

  $ 15,769     $ 6,119