v3.26.1
Note 9 - Stockholders' Equity - Warrants Activity (Details)
 9 Months Ended
Jun. 30, 2026
$ / shares
shares
The 2025 Pre-funded Warrants [Member]  
Outstanding (in shares) | shares 0
Issued (in shares) | shares 7,000,000
Exercised (in shares) | shares (1,000,000)
Canceled/Expired (in shares) | shares 0
Outstanding (in shares) | shares 6,000,000
The 2025 Pre-funded Warrants [Member] | Weighted Average [Member]  
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 0
Issued, weighted average exercise price (in dollars per share) | $ / shares 0.001
Exercised, weighted average exercise price (in dollars per share) | $ / shares 0.001
Canceled/Expired, weighted average exercise price (in dollars per share) | $ / shares 0
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 0.001
Warrants Activity, Excluding Pre-funded Warrants [Member]  
Outstanding (in shares) | shares 0
Issued (in shares) | shares 16,800,000
Exercised (in shares) | shares 0
Canceled/Expired (in shares) | shares 0
Outstanding (in shares) | shares 16,800,000
Warrants Activity, Excluding Pre-funded Warrants [Member] | Weighted Average [Member]  
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 0
Issued, weighted average exercise price (in dollars per share) | $ / shares 3
Exercised, weighted average exercise price (in dollars per share) | $ / shares 0
Canceled/Expired, weighted average exercise price (in dollars per share) | $ / shares 0
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 3