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Note 6 - Debt (Details Textual)
$ in Millions
12 Months Ended
Jul. 27, 2022
USD ($)
Jan. 05, 2022
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Jul. 26, 2022
USD ($)
Proceeds from Lines of Credit     $ 0.5 $ 15.2  
Credit Agreement [Member]          
Debt Instrument, Face Amount   $ 15.0 20.0   $ 20.0
Line of Credit Facility, Maximum Borrowing Capacity   $ 100.0      
Proceeds from Lines of Credit $ 10.7        
Debt Instrument, Covenant, Ratio of Total Debt to EBITDAX   3      
Debt Instrument, Covenant, Ratio of Consolidated Current Assets to Consolidated Current Liabilities   1      
Long-Term Debt, Gross     $ 5.0 $ 12.0  
Credit Agreement [Member] | Minimum [Member]          
Debt Instrument, Covenant, Restricted Payment, Percentage of Existing Borrowing Base   20.00%      
Credit Agreement [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]          
Debt Instrument, Basis Spread on Variable Rate   0.50%      
Credit Agreement [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] | Minimum [Member]          
Debt Instrument, Applicable Margin on Basis Spread   0.25%      
Credit Agreement [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] | Maximum [Member]          
Debt Instrument, Applicable Margin on Basis Spread   1.25%