v3.26.1
Note 8 - Stockholders' Equity - Stock Option and Warrant Activity (Details) - $ / shares
3 Months Ended 9 Months Ended
Apr. 01, 2026
Jan. 30, 2026
Mar. 05, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Outstanding, options (in shares)           1,988,677  
Outstanding, options, weighted average exercise price (in dollars per share)           $ 1.99  
Outstanding, warrants (in shares)              
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 10,000 250,000       260,000  
Granted, options, weighted average exercise price (in dollars per share) $ 0.9 $ 0.82       $ 0.82  
Exercised or redeemed, options (in shares)           (1,000)  
Exercised or redeemed, options, weighted average exercise price (in dollars per share)           $ 0.81  
Exercised or redeemed, warrants (in shares)       0 0 0 0
Forfeited, options (in shares)     (108)     (110,340)  
Forfeited, options, weighted average exercise price (in dollars per share)           $ 1.23  
Expired, options (in shares)           (48)  
Expired, options, weighted average exercise price (in dollars per share)           $ 227.5  
Expired, warrants (in shares)       (166,536) 0 (199,427) 0
Outstanding, options (in shares)       2,137,289   2,137,289  
Outstanding, options, weighted average exercise price (in dollars per share)       $ 1.89   $ 1.89  
Outstanding, warrants (in shares)       662,106   662,106  
Options vested and exercisable (in shares)       1,768,949   1,768,949  
Options vested and exercisable, options, weighted average exercise price (in dollars per share)       $ 2.08   $ 2.08  
Stock Warrants [Member]              
Outstanding, warrants (in shares)           861,533  
Outstanding, warrants, weighted average exercise price (in dollars per share)           $ 2.77  
Granted, warrants (in shares)           0  
Granted, warrants, weighted average exercise price (in dollars per share)           $ 0  
Exercised or redeemed, warrants (in shares)           0  
Exercised or redeemed, warrants, weighted average exercise price (in dollars per share)           $ 0  
Expired, warrants (in shares)           (199,427)  
Expired, warrants, weighted average exercise price (in dollars per share)           $ 3.87  
Outstanding, warrants (in shares)       662,106   662,106  
Outstanding, warrants, weighted average exercise price (in dollars per share)       $ 2.24   $ 2.24