v3.25.2
Note 8 - Warrants and Other Derivative Liabilities and Fair Value Measurements (Tables)
9 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Number of remaining warrants (after reverse stock splits)     Exercise price (after reverse stock splits)     Floor in a cashless exercise formula, after the Warrant exchange     Convertible into, shares, theoretically     Fair value of shares, million     Change in shares if closing bid price was $1 lower     Change in shares if closing bid price was $1 higher     Theoretical maximum number of shares to be issued, million  
0.0004     $ 91,050,000,000     $ 0.01       196,189     $ 21.2       1,534       (1,138 )     2,887  
0.0400       168,000,000       0.01       40,242       4.3       276       (272 )     592  
0.3575       64,500,000       0.01       138,136       14.9       946       (933 )     2,031  
0.3357       40,500,000       0.01       81,459       8.8       558       (550 )     1,197  
0.2588       13,500,000       0.01       20,935       2.3       144       (141 )     308  
3.4746       4,850,000       0.01       100,963       10.9       691       (682 )     1,484  
3.9474       900,000       0.01       21,284       2.3       146       (143 )     313  
11.4833       300,000       0.01       20,639       2.2       142       (139 )     303  
6.0150       200,000       0.01       7,207       0.8       50       (48 )     106  
12,908.4316       4,000       0.01       309,345       33.4       2,119       (2,090 )     4,547  
12,934.3443                     936,399     $ 101.1       6,605       (6,138 )     13,768  
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
           

Quoted Prices

   

Significant

         
           

in Active

   

Other

   

Significant

 
           

Markets for

   

Observable

   

Unobservable

 
   

June 30,

   

Identical Assets

   

Inputs

   

Inputs

 
   

2025

   

(Level 1)

   

(Level 2)

   

(Level 3)

 

Liabilities recorded at fair value on a recurring basis

  $ 101,060,811     $     $ 101,060,811     $  
           

Quoted Prices

   

Significant

         
           

in Active

   

Other

   

Significant

 
           

Markets for

   

Observable

   

Unobservable

 
   

September 30,

   

Identical Assets

   

Inputs

   

Inputs

 
   

2024

   

(Level 1 )

   

(Level 2)

   

(Level 3)

 

Liabilities recorded at fair value on a recurring basis

  $ 79,742,180     $     $ 79,742,180     $  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Balance, September 30, 2024

  $ 79,742,180  

Warrants recognized upon issuance of convertible instruments

    134,722,170  

Loss / (gain) on revaluation

    (58,787,404 )

Loss / (gain) on exchange of warrants

    57,770,454  

Conversions of derivatives into common shares

    (112,386,589 )

Balance, June 30, 2025

  $ 101,060,811  
         
         

Balance, September 30, 2023

  $ 64,863,309  

Warrants recognized upon issuance of convertible instruments

    28,002,395  

Loss / (gain) on derivative liability revaluation

    805,135  

Derivatives issued upon extinguishment of accounts payable

    6,985,740  

Conversions of warrants into common shares

    (71,126,401 )

Balance, June 30, 2024

  $ 29,530,178