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Note 3 - Equity - Schedule of Preferred Stock Redemption (Details) - Series B Preferred Stock [Member] - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2025
 [1]
Mar. 31, 2025
 [1]
Dec. 31, 2024
 [1]
Sep. 30, 2024
 [1]
Jun. 30, 2025
 [1]
Aug. 29, 2023
Preferred Stock, Shares, Shares Redeemed During Period (in shares) 70,093 70,093 70,093 70,093 70,093 280,372  
Preferred Stock, Redemption Price Per Share (in dollars per share) $ 10.7 $ 10.7 $ 10.7 $ 10.7 $ 10.7 $ 10.7 $ 10.7
Preferred Stock, Redemption, Amount Expended During Period for Redemption $ 749,995 $ 749,995 $ 749,995 $ 749,995 $ 749,995 $ 2,999,980  
Preferred Stock, Redemption Amount, Future Redeemable Securities $ 2,846,254 $ 3,596,249 $ 4,346,244 $ 5,096,239   $ 3,596,249  
[1] We close our books and records on the last calendar day of each month to align our financial closing with our business processes.