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Note 6 - Line of Credit (Details Textual) - USD ($)
12 Months Ended
Feb. 13, 2023
Dec. 31, 2024
Dec. 31, 2023
Payments of Debt Issuance Costs   $ (0) $ 7,500
Revolving Credit Facility [Member]      
Line of Credit Facility, Interest Rate at Period End     9.00%
Long-Term Line of Credit $ 7,000,000 $ 0 $ 6,350,000
Payments of Debt Issuance Costs $ 7,500    
Debt Instrument, Unamortized Discount (Premium), Net     $ 4,022