Quarterly report [Sections 13 or 15(d)]

Note 9 - Stockholders' Equity (Details Textual)

v3.25.2
Note 9 - Stockholders' Equity (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 26 Months Ended
May 02, 2024
Dec. 18, 2023
Dec. 13, 2023
May 12, 2023
May 02, 2023
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Sep. 30, 2024
Mar. 31, 2023
Preferred Stock, Shares Issued (in shares)           0   0         0   0 0  
Security Offering, Maximum Value of Securities, Shelf Registration                                 $ 200,000,000
Security Offering, Remaining Value of Securities, Shelf Registration           $ 109,000,000   $ 109,000,000         $ 109,000,000   $ 109,000,000    
Stock Issued During Period, Value, Issued for Services                 $ 98,020                
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs                     $ 851 $ 164,313          
Preferred Stock, Shares Outstanding (in shares)           0   0         0   0 0  
Public Offering [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)   5,270,833                              
Shares Issued, Price Per Share (in dollars per share)   $ 7.2                              
Proceeds from Issuance or Sale of Equity   $ 35,200,000                     $ 0 $ 35,228,564      
Stock Issued During Period, Value, New Issues                       35,229,415          
Lincoln Park Purchase Agreement [Member]                                  
Stock Issued During Period, Shares, Issued for Services (in shares) 80,000                                
Stock Issued During Period, Value, Issued for Services $ 1,000,000                                
Stock Issued During Period, Shares, New Issues (in shares)                         0 180,000 302,500    
Proceeds from Issuance or Sale of Equity                         $ 0 $ 1,661,490      
Shares Purchase Agreement, Value, Shares Authorized     $ 50,000,000   $ 100,000,000                        
Share Purchase Agreement, Term (Month)         36 months                        
Shares Purchase Agreement, Shares Authorized (in shares)         22,500                        
Shares Purchase Agreement, Value, Maximum Commitment         $ 2,500,000                        
Shares Purchase Agreement, Shares, Maximum Commitment (in shares)         200,000                        
Shares Purchase Agreement, Accelerated Purchase Date, Percent Of Trading Volume         30.00%                        
Shares Purchase Agreement, Accelerated Purchase Date, Purchase Price, Percent         97.00%                        
Shares Purchase Agreement, Shares Authorized, Aggregate Maximum (in shares)         1,767,850                        
Shares Purchase Agreement, Shares Authorized, Percentage of Common Shares Oustanding         19.99%                        
Stock Issued During Period, Value, New Issues                       1,661,490   1,700,000 $ 3,100,000    
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs                           $ 164,000      
Deferred Offering Costs 57,000                                
Deferred Costs $ 1,100,000                                
Unamortized Debt Issuance Expense           $ 870,000   $ 870,000         870,000   $ 870,000 $ 870,000  
Lincoln Park Purchase Agreement [Member] | Shares Required to be Purchased if Closing Price is $6.00 or Above [Member]                                  
Shares Issued, Price Per Share (in dollars per share)         $ 60                        
Shares Purchase Agreement, Shares Authorized (in shares)         25,000                        
Lincoln Park Purchase Agreement [Member] | Shares Required to be Purchased if Closing Price is $8.00 or Above [Member]                                  
Shares Issued, Price Per Share (in dollars per share)         $ 80                        
Shares Purchase Agreement, Shares Authorized (in shares)         27,500                        
Lincoln Park Purchase Agreement [Member] | Maximum [Member]                                  
Shares Issued, Price Per Share (in dollars per share)         $ 2.5                        
Shares Purchase Agreement, Value, Shares Authorized     50,000,000   $ 100,000,000                        
Lincoln Park Purchase Agreement [Member] | Minimum [Member]                                  
Shares Purchase Agreement, Value, Shares Authorized     $ 50,000,000                            
Lincoln Park Purchase Agreement [Member] | Weighted Average [Member]                                  
Shares Issued, Price Per Share (in dollars per share)         $ 12.6                        
Jefferies Sales Agreement [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)                           9,016      
Proceeds from Issuance or Sale of Equity                         $ 0 $ 66,551      
Shares Purchase Agreement, Value, Shares Authorized       $ 75,000,000                          
Stock Issued During Period, Value, New Issues                       $ 66,551   $ 67,000      
Common Stock, Capital Shares Reserved for Future Issuance (in shares)       3,960,907                          
Third Party Consultant [Member]                                  
Stock Issued During Period, Shares, Issued for Services (in shares)             20,000                    
Stock Issued During Period, Value, Issued for Services             $ 98,000                    
Stock Returned, Shares, Previously Issued for Service           $ 8,000                      
Preferred Class A [Member]                                  
Preferred Stock, Shares Authorized (in shares)           5,000,000   5,000,000         5,000,000   5,000,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share)           $ 0.01   $ 0.01         $ 0.01   $ 0.01    
Preferred Stock, Shares Issued (in shares)           0   0         0   0 0  
Preferred Stock, Shares Outstanding (in shares)           0   0         0   0 0  
Preferred Class, Series A-1 [Member]                                  
Preferred Stock, Shares Authorized (in shares)           1,040,000   1,040,000         1,040,000   1,040,000    
Preferred Class, Series A-2 [Member]                                  
Preferred Stock, Shares Authorized (in shares)           1,500,000   1,500,000         1,500,000   1,500,000    
Preferred Class, Series A-3 [Member]                                  
Preferred Stock, Shares Authorized (in shares)           700,000   700,000         700,000   700,000    
Preferred Class, Series A-4 [Member]                                  
Preferred Stock, Shares Authorized (in shares)           548,000   548,000         548,000   548,000    
Series B Preferred Stock [Member]                                  
Preferred Stock, Shares Authorized (in shares)           15,000   15,000         15,000   15,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share)           $ 0.5   $ 0.5         $ 0.5   $ 0.5    
Preferred Stock, Shares Issued (in shares)           0   0         0   0 0  
Preferred Stock, Shares Outstanding (in shares)           0   0         0   0 0  
Preferred Stock [Member]                                  
Stock Issued During Period, Shares, Period Increase (Decrease) (in shares)               0   0     0 0