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Note 5 - Stock Based Compensation (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2023
shares
May 31, 2022
shares
Nov. 30, 2024
$ / shares
shares
Oct. 31, 2024
$ / shares
shares
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Share-Based Payment Arrangement, Expense | $         $ 353,000 $ 493,000 $ 1,299,000 $ 1,505,000
Equity Classified Warrants [Member]                
Share-Based Payment Arrangement, Expense | $         26,000 $ 50,000 94,000 $ 142,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $         $ 283,000   $ 283,000  
Subsequent Event [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)       545,000        
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     267,500          
Share Based Compensation Arrangement by Share Based Payment Award, Number of Installment Periods     4          
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member]                
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ / shares     $ 2.54          
Subsequent Event [Member] | Performance-based Restricted Stock Units [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     73,334          
Subsequent Event [Member] | Warrants [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     36,000          
Subsequent Event [Member] | Share-Based Payment Arrangement, Option [Member] | Minimum [Member]                
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ / shares       $ 2.45        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     1 year          
Subsequent Event [Member] | Share-Based Payment Arrangement, Option [Member] | Maximum [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     4 years          
The 2015 Stock Plan [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 116,667 133,334            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 366,667              
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)         2,853   2,853  
The 2024 Stock Plan [Member] | Subsequent Event [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)       1,000,000