v3.25.2
Note 8 - Warrants and Other Derivative Liabilities and Fair Value Measurements - Schedule of Warrants (Details)
$ / shares in Units, $ in Millions
 9 Months Ended
Jun. 30, 2025
USD ($)
$ / shares
shares
Number of remaining warrants (in shares)
Number of Securities (in shares) 101.1
Fair value | $ $ 6,605
Change in shares if Closing bid price was $1 lower (in shares) (6,138)
Change in shares if Closing bid price was $1 higher (in shares) 13,768
Warrant One [Member]  
Number of remaining warrants (in shares) 91,050,000,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 196,189
Number of Securities (in shares) 21.2
Fair value | $ $ 1,534
Change in shares if Closing bid price was $1 lower (in shares) (1,138)
Change in shares if Closing bid price was $1 higher (in shares) 2,887
Warrant Two [Member]  
Number of remaining warrants (in shares) 168,000,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 40,242
Number of Securities (in shares) 4.3
Fair value | $ $ 276
Change in shares if Closing bid price was $1 lower (in shares) (272)
Change in shares if Closing bid price was $1 higher (in shares) 592
Warrant Three [Member]  
Number of remaining warrants (in shares) 64,500,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 138,136
Number of Securities (in shares) 14.9
Fair value | $ $ 946
Change in shares if Closing bid price was $1 lower (in shares) (933)
Change in shares if Closing bid price was $1 higher (in shares) 2,031
Warrant Four [Member]  
Number of remaining warrants (in shares) 40,500,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 81,459
Number of Securities (in shares) 8.8
Fair value | $ $ 558
Change in shares if Closing bid price was $1 lower (in shares) (550)
Change in shares if Closing bid price was $1 higher (in shares) 1,197
Warrant Five [Member]  
Number of remaining warrants (in shares) 13,500,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 20,935
Number of Securities (in shares) 2.3
Fair value | $ $ 144
Change in shares if Closing bid price was $1 lower (in shares) (141)
Change in shares if Closing bid price was $1 higher (in shares) 308
Warrant Six [Member]  
Number of remaining warrants (in shares) 4,850,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 100,963
Number of Securities (in shares) 10.9
Fair value | $ $ 691
Change in shares if Closing bid price was $1 lower (in shares) (682)
Change in shares if Closing bid price was $1 higher (in shares) 1,484
Warrant Seven [Member]  
Number of remaining warrants (in shares) 900,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 21,284
Number of Securities (in shares) 2.3
Fair value | $ $ 146
Change in shares if Closing bid price was $1 lower (in shares) (143)
Change in shares if Closing bid price was $1 higher (in shares) 313
Warrant Eight [Member]  
Number of remaining warrants (in shares) 300,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 20,639
Number of Securities (in shares) 2.2
Fair value | $ $ 142
Change in shares if Closing bid price was $1 lower (in shares) (139)
Change in shares if Closing bid price was $1 higher (in shares) 303
Warrant Nine [Member]  
Number of remaining warrants (in shares) 200,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 7,207
Number of Securities (in shares) 0.8
Fair value | $ $ 50
Change in shares if Closing bid price was $1 lower (in shares) (48)
Change in shares if Closing bid price was $1 higher (in shares) 106
Warrant Ten [Member]  
Number of remaining warrants (in shares) 4,000
Exercise Price (in dollars per share) | $ / shares $ 0.01
Floor in a cashless exercise (in dollars per share) | $ / shares $ 309,345
Number of Securities (in shares) 33.4
Fair value | $ $ 2,119
Change in shares if Closing bid price was $1 lower (in shares) (2,090)
Change in shares if Closing bid price was $1 higher (in shares) 4,547