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Note 3 - Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2024
Apr. 30, 2020
Sep. 30, 2024
Sep. 30, 2023
Allowance for Doubtful Accounts, Premiums and Other Receivables $ 0   $ 0  
Finite-Lived Intangible Asset, Useful Life 25 years 25 years 25 years  
Share-Based Payment Arrangement, Option [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate     0.00% 0.00%
Licensing Agreements [Member]        
Finite-Lived Intangible Asset, Useful Life 25 years 25 years 25 years  
License Agreement, Renewal Period   5 years 5 years  
Capitalized Costs, Property Plant and Equipment [Member]        
Property, Plant and Equipment, Additions $ 5      
Computer Equipment [Member]        
Depreciation, Declining Balance Method, Percentage     30.00%  
Property, Plant and Equipment, Useful Life 3 years   3 years  
Furniture and Equipment [Member]        
Depreciation, Declining Balance Method, Percentage     20.00%  
Property, Plant and Equipment, Useful Life 4 years   4 years