Annual report pursuant to Section 13 and 15(d)

Note 10 - Stockholders' Equity (Details Textual)

v3.24.4
Note 10 - Stockholders' Equity (Details Textual) - USD ($)
12 Months Ended 36 Months Ended
Dec. 18, 2023
Dec. 13, 2023
May 12, 2023
May 02, 2023
Apr. 12, 2023
Jun. 26, 2020
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2023
Mar. 31, 2023
Preferred Stock, Shares Issued (in shares)             0 0 0  
Preferred Stock, Shares Outstanding (in shares)             0 0 0  
Common Stock, Shares Authorized (in shares)             308,000,000 308,000,000 308,000,000  
Common Stock, Par or Stated Value Per Share (in dollars per share)             $ 0.01 $ 0.01 $ 0.01  
Security Offering, Maximum Value of Securities, Shelf Registration                   $ 200,000,000
Security Offering, Remaining Value of Securities, Shelf Registration             $ 109,000,000      
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs             164,313 $ 138,182    
Public Offering [Member]                    
Stock Issued During Period, Shares, New Issues (in shares) 52,708,332                  
Shares Issued, Price Per Share (in dollars per share) $ 0.72                  
Proceeds from Issuance or Sale of Equity $ 35,200,000           35,228,564 $ 0    
Stock Issued During Period, Value, New Issues             35,228,564      
Aspire Purchase Agreement [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)               2,779,713 4,424,450  
Share Purchase Agreement, Term (Month)           36 months     36 months  
Shares Purchase Agreement, Value, Shares Authorized           $ 23,900,000        
Stock Issued During Period, Value, New Issues               $ 3,400,000 $ 8,400,000  
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs               $ 105,000    
Stock Issued During Period, Shares, Issued for Services (in shares)               212,130    
Stock Issued During Period, Value, Issued for Services               $ 700,000    
Deferred Offering Costs               700,000 700,000  
Unamortized Debt Issuance Expense               500,000 500,000  
Frost Gamma Investments Trust Purchase Agreement [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)         5,000,000          
Shares Issued, Price Per Share (in dollars per share)         $ 1          
Proceeds from Issuance or Sale of Equity             0 4,969,045    
Stock Issued During Period, Value, New Issues         $ 5,000,000     4,969,045    
Proceeds from Issuance of Common Stock         $ 31,000          
Lincoln Park Purchase Agreement [Member]                    
Share Purchase Agreement, Term (Month)       36 months            
Stock Issued During Period, Value, New Issues               $ 1,008,000    
Stock Issued During Period, Shares, Issued for Services (in shares)               800,000    
Stock Issued During Period, Value, Issued for Services             1,000,000      
Deferred Offering Costs             57,000      
Shares Purchase Agreement, Shares Authorized (in shares)       225,000            
Shares Purchase Agreement, Value, Maximum Commitment       $ 2,500,000            
Shares Purchase Agreement, Shares, Maximum Commitment (in shares)       2,000,000            
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)       17,678,502            
Shares Purchase Agreement, Shares Authorized, Percentage of Common Shares Oustanding       19.99%            
Deferred Costs             $ 1,100,000      
Shares Purchase Agreement, Value, Aggregate Maximum       $ 50,000,000            
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)       $ 6            
Shares Purchase Agreement, Shares Authorized (in shares)       250,000            
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)       $ 8            
Shares Purchase Agreement, Shares Authorized (in shares)       275,000            
Lincoln Park Purchase Agreement [Member] | Obligation to Issue Shares Based on Aggregation of Stock Ownership [Member]                    
Stock Issued During Period, Value, New Issues       $ 1,000,000            
Lincoln Park Purchase Agreement [Member] | Maximum [Member]                    
Shares Purchase Agreement, Value, Shares Authorized   $ 50,000,000   $ 100,000,000            
Lincoln Park Purchase Agreement [Member] | Weighted Average [Member]                    
Shares Issued, Price Per Share (in dollars per share)             $ 1.26      
Lincoln Park Purchase Agreement 2 [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)             1,800,000 1,225,000    
Stock Issued During Period, Value, New Issues             $ 1,700,000 $ 1,400,000    
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs             200,000 30,000    
Unamortized Debt Issuance Expense             $ 900,000 $ 1,000,000 $ 1,000,000  
Jefferies Sales Agreement [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)             90,156 1,277,259    
Proceeds from Issuance or Sale of Equity             $ 66,551 $ 1,040,321    
Shares Purchase Agreement, Value, Shares Authorized     $ 75,000,000              
Stock Issued During Period, Value, New Issues             66,551 $ 1,040,321    
Unamortized Debt Issuance Expense             200,000      
Common Stock, Capital Shares Reserved for Future Issuance (in shares)     39,609,072              
Loss on Contract Termination             $ 200,000      
Preferred Class A [Member]                    
Preferred Stock, Shares Authorized (in shares)             5,000,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share)             $ 0.01      
Preferred Stock, Shares Issued (in shares)             0 0 0  
Preferred Stock, Shares Outstanding (in shares)             0 0 0  
Preferred Class, Series A-1 [Member]                    
Preferred Stock, Shares Authorized (in shares)             1,040,000      
Preferred Class, Series A-2 [Member]                    
Preferred Stock, Shares Authorized (in shares)             1,500,000      
Preferred Class, Series A-3 [Member]                    
Preferred Stock, Shares Authorized (in shares)             700,000      
Preferred Class, Series A-4 [Member]                    
Preferred Stock, Shares Authorized (in shares)             548,000      
Series B Preferred Stock [Member]                    
Preferred Stock, Shares Authorized (in shares)             15,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share)             $ 0.5      
Preferred Stock, Shares Issued (in shares)             0 0 0  
Preferred Stock, Shares Outstanding (in shares)             0 0 0