v3.25.2
Note 9 - Stockholders' Equity - Transactions With Preferred Stock (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Balance $ 52,995,150 $ 52,995,150 $ (107,054,143) $ (69,540,529) $ (16,545,877) [1] $ 117,414,643 $ 272,808,110 [1]
Extinguishment of Series C P/S by issuance of Series E P/S $ (1,212) $ (1,212)          
Preferred Stock [Member]              
Balance (in shares) 364,203 364,203 364,203 364,203 364,203 [1] 1,575,502 1,575,502 [1]
Balance $ 364 $ 364 $ 364 $ 364 $ 364 [1] $ 1,576 $ 1,576 [1]
Extinguishment of Series C P/S by issuance of Series E P/S (in shares) (1,211,299) (1,211,299)          
Extinguishment of Series C P/S by issuance of Series E P/S $ (1,212) $ (1,212)          
Preferred Stock [Member] | Series A Preferred Stock [Member]              
Balance (in shares) 648 648 648 648 648 648 648
Balance $ 1 $ 1 $ 1 $ 1 $ 1 $ 1 $ 1
Extinguishment of Series C P/S by issuance of Series E P/S (in shares)          
Extinguishment of Series C P/S by issuance of Series E P/S          
Preferred Stock [Member] | Series C Preferred Stock [Member]              
Balance (in shares) 458 458 458 458 458 1,211,757 1,211,757
Balance $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,212 $ 1,212
Extinguishment of Series C P/S by issuance of Series E P/S (in shares) (1,211,299) (1,211,299)          
Extinguishment of Series C P/S by issuance of Series E P/S $ (1,212) $ (1,212)          
Preferred Stock [Member] | Series D Preferred Stock [Member]              
Balance (in shares) 363,097 363,097 363,097 363,097 363,097 363,097 363,097
Balance $ 363 $ 363 $ 363 $ 363 $ 363 $ 363 $ 363
Extinguishment of Series C P/S by issuance of Series E P/S (in shares)          
Extinguishment of Series C P/S by issuance of Series E P/S          
[1] Adjusted retroactively for reverse stock splits, see Note 1 - Description of Business and Basis of Presentation