Annual report pursuant to Section 13 and 15(d)

Note 2 - Summary of Significant Accounting Policies - Potentially Dilutive Securities (Details)

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Note 2 - Summary of Significant Accounting Policies - Potentially Dilutive Securities (Details) - shares
12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Anti-dilutive securities (in shares) 27,124,890 1,557,530
Share-Based Payment Arrangement, Option [Member]    
Anti-dilutive securities (in shares) 102,125 98,626
Warrant [Member]    
Anti-dilutive securities (in shares) 26,284,002 806,452
Convertible Debt Securities [Member]    
Anti-dilutive securities (in shares) 738,763 652,202
Restricted Stock [Member]    
Anti-dilutive securities (in shares) 0 250