Quarterly report [Sections 13 or 15(d)]

Note 8 - Debt (Details Textual)

v3.25.1
Note 8 - Debt (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Dec. 30, 2024
Mar. 05, 2018
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Sep. 30, 2023
Nov. 01, 2022
Payment for Debt Extinguishment or Debt Prepayment Cost         $ 4,221,611 $ (0)      
Gain (Loss) on Extinguishment of Debt     $ 0 $ 0 8,624,778 $ 0      
Credit Agreement [Member]                  
Debt Instrument, Face Amount   $ 10,000,000              
Long-Term Debt   $ 0              
Residual Royalty Financing Agreement [Member]                  
Royalty Agreement, Payment, Percentage   5.00%              
Payment for Debt Extinguishment or Debt Prepayment Cost $ 4,200,000                
Gain (Loss) on Extinguishment of Debt $ 8,600,000                
Residual Royalty Financing Agreement [Member] | Scenario, Change of Control or Sale of Business [Member]                  
Royalty Agreement, Payment, Percentage   5.00%              
Royalty Agreement, Payment to Agent   $ 2,000,000              
Credit Agreement and Residual Royalty Financing Agreement [Member]                  
Debt Instrument, Face Amount   $ 10,000,000              
Premium Finance Agreement [Member]                  
Debt Instrument, Face Amount                 $ 1,400,000
Debt Instrument, Interest Rate, Stated Percentage                 6.30%
Accrued Liabilities and Other Liabilities     $ 0   $ 0   $ 0 $ 100,000