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Note 6 - Debt (Details Textual) - Revolving Credit Facility [Member] - General Credit Agreement [Member] - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Line of Credit Facility, Maximum Borrowing Capacity $ 500,000  
Long-Term Line of Credit $ 0 $ 0
Debt Instrument, Basis Spread on Variable Rate 6.75%  
Debt Instrument, Prime Rate Floor 3.75%