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Note 9 - Stock Based Compensation (Tables)
12 Months Ended
Sep. 30, 2024
Notes Tables  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
          

Weighted-average

     
          

remaining

  

Aggregate

 
      

Weighted-average

  

contractual term

  

intrinsic value

 
  

Number of shares

  

exercise price

  

(in years)

  

(in thousands)

 

Outstanding at September 30, 2022

  55,656  $151.10   4.55  $- 

Granted

  7,233   11.51   -     

Exercised

  -   -         

Forfeited

  (21,124)  88.12         

Outstanding at September 30, 2023

  41,765   144.43   3.65   - 

Granted

  8,000   0.86   -     

Exercised

  -   -         

Forfeited

  (5,730)  117.35         

Outstanding at September 30, 2024

  44,035   123.58   3.14   - 
                 

Exercisable at September 30, 2024

  44,035  $123.58   3.14  $-