General form of registration statement for all companies including face-amount certificate companies

Note 6 - Stock-based Compensation (Details Textual)

v3.23.3
Note 6 - Stock-based Compensation (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 27, 2021
Jan. 27, 2021
Oct. 14, 2020
Jun. 18, 2013
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Oct. 01, 2022
Oct. 01, 2021
Common Stock, Shares Authorized         12,000,000   12,000,000   12,000,000 12,000,000    
Research and Development Expense [Member]                        
Share-Based Payment Arrangement, Expense         $ 7,000 $ 29,000 $ 55,000 $ 123,000 $ 148,000 $ 124,000    
General and Administrative Expense [Member]                        
Share-Based Payment Arrangement, Expense         34,000 52,000 156,000 245,000 311,000 267,000    
Employees Directors And Consultants [Member]                        
Share-Based Payment Arrangement, Expense         41,000 81,000 211,000 367,000 459,000 391,000    
Non Employee Restricted Shares [Member]                        
Share-Based Payment Arrangement, Expense         $ 0 $ 10,000 $ 3,000 $ 30,000 $ 40,000 $ 105,000    
The 2013 Plan [Member]                        
Common Stock, Shares Authorized                 170,571 155,571 185,571 170,571
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized       15,000                
Share-based Payment Arrangement, Annual Increase in Authorized Shares, Maximum Percentage of Common Stock Outstanding       4.00%                
Increase In Aggregate Number Of Shares                     15,000 15,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant         0   0   41,366      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount         $ 200,000   $ 200,000   $ 181,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition             2 years 1 month 9 days   2 years 5 months 19 days      
The 2013 Plan [Member] | Restricted Stock [Member] | Board Of Directors And Management [Member]                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)             20,875   2,375      
The 2013 Plan [Member] | Restricted Stock [Member] | Consultants [Member]                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) 1,500 2,500 250                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Other (in shares)             3,625   4,250