v3.26.1
Note 5 - Stockholders' Equity (Details Textual)
 12 Months Ended
Aug. 03, 2025
USD ($)
Mar. 10, 2025
USD ($)
$ / shares
shares
Apr. 30, 2026
USD ($)
$ / shares
shares
Apr. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2026
$ / shares
shares
Jan. 31, 2026
$ / shares
shares
Dec. 31, 2025
$ / shares
shares
Sep. 30, 2025
$ / shares
shares
Aug. 31, 2025
USD ($)
Jul. 09, 2025
$ / shares
May 28, 2025
$ / shares
May 06, 2024
$ / shares
Apr. 30, 2024
$ / shares
Nov. 30, 2023
USD ($)
Nov. 17, 2023
USD ($)
Nov. 09, 2023
USD ($)
Sep. 30, 2023
USD ($)
Sep. 28, 2023
USD ($)
Mar. 10, 2023
USD ($)
Preferred Stock, Shares Authorized (in shares)     20,000,000                                
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001             $ 0.001                  
Common Stock, Shares Authorized (in shares)     500,000,000   500,000,000   500,000,000                        
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001   $ 0.001   $ 0.001     $ 0.001   $ 0.001              
Common Stock, Shares, Issued (in shares)     3,188,380 1,119,107 3,188,380   1,119,107                        
Proceeds from Issuance of Common Stock | $     $ 172,839 $ 1,147,578                              
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)       94,461                              
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares     $ 0 $ 0                              
Restricted Stock [Member]                                      
Stock Issued During Period, Shares, New Issues (in shares)     70,000                                
Conversion of Streeterville Note into Common Stock [Member]                                      
Debt Conversion, Original Debt, Principal | $     $ 1,975,000 $ 85,000                              
Debt Conversion, Original Debt, Interest | $     $ 45,000                                
Debt Conversion, Converted Instrument, Shares Issued (in shares)     570,626 26,952                              
Conversion of Series D Preferred into Common Stock [Member]                                      
Debt Conversion, Converted Instrument, Shares Issued (in shares)       1,379,789                              
Conversion of Series D Preferred into Common Stock [Member]                                      
Conversion of Stock, Shares Converted (in shares)     1,379,789                                
Conversion of Stock, Shares Issued (in shares)     1,379,789                                
Unit Warrants [Member]                                      
Preferred Stock, Number in One Unit (in shares)     1                                
Common Stock, Number in One Unit (in shares)     1                                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 5                                
Class of Warrant or Right, Number in One Unit (in shares)     1                                
Agent Unit Warrants [Member]                                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)             57,353                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares             $ 4.375                        
Common Stock Warrants [Member]                                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           1,912,383   12,000                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 5   $ 3.65                      
Warrants and Rights Outstanding, Term (Year)           5 years                          
Common Stock Warrants [Member] | Maximum [Member]                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 425 $ 825                 $ 825            
Unit Offering [Member]                                      
Units Authorized (in shares)   4,285,714                                  
Common Stock, Number in One Unit (in shares)   1                                  
Unit Offering Price (in dollars per share) | $ / shares   $ 3.5                                  
Units Authorized, Value | $   $ 15,000,000                                  
Units, Cash Fee, Percent   7.00%                                  
Units, Percent Awarded   3.00%                                  
Units, Issued During Period (in shares)     1,912,383                                
Proceeds from Issuance of Units | $     $ 6,700,000                                
Unit Offering [Member] | Unit Warrants [Member]                                      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   4,285,714                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 5                                  
Unit Offering [Member] | Agent Unit Warrants [Member]                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 4.375                                  
Class of Warrant or Right, Number in One Unit (in shares)   1                                  
Lincoln Park Agreement [Member]                                      
Stock Issued During Period, Shares, New Issues (in shares)     0 200,239                              
Sale of Stock, Value, Authorized | $                                     $ 15,000,000
Sale of Stock, Purchase Term (Month)                                     36 months
Proceeds from Issuance of Common Stock | $       $ 674,000                              
ATM Offering [Member]                                      
Stock Issued During Period, Shares, New Issues (in shares)     48,858 120,857                              
Sale of Stock, Value, Authorized | $ $ 25,000,000               $ 25,000,000         $ 15,000,000 $ 15,000,000 $ 10,000,000 $ 3,250,000    
Proceeds from Issuance of Common Stock | $     $ 200,000                                
Common Stock, Value, Authorized | $                                   $ 50,000,000  
Commission Rate 4.00%                                    
Percent of Gross Sales Price 3.00%                                    
ATM Offering [Member] | Maximum [Member]                                      
Proceeds from Issuance of Common Stock | $ $ 11,036,310                                    
Series A Preferred Stock [Member]                                      
Preferred Stock, Shares Designated (in shares)     10,000                                
Series B Preferred Stock [Member]                                      
Preferred Stock, Shares Designated (in shares)     10,000                                
Series C Preferred Stock [Member]                                      
Preferred Stock, Shares Authorized (in shares)         20,000,000   20,000,000                        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.001   $ 0.001                        
Preferred Stock, Shares Designated (in shares)     600,000   600,000   600,000                        
Share Price (in dollars per share) | $ / shares     $ 25                                
Preferred Stock, Shares Outstanding (in shares)     380,440 380,440 380,440   380,440                        
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares     $ 1.5                                
Preferred Stock, Dividends Per Share, Declared (in dollars per share) | $ / shares     $ 0                                
Preferred Stock, Convertible, Shares Issuable (in shares)     292,200                                
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares     $ 32.55                                
Series C Preferred Stock [Member] | FRV [Member]                                      
Investment Owned, Balance, Shares (in shares)     71,000                                
Series D Preferred Stock [Member]                                      
Preferred Stock, Shares Authorized (in shares)         20,000,000   20,000,000                        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.001   $ 0.001       $ 3.5                
Preferred Stock, Shares Designated (in shares)     4,285,714   4,285,714   4,285,714                        
Preferred Stock, Shares Outstanding (in shares)     532,594   532,594   0                        
Preferred Stock, Dividends Per Share, Declared (in dollars per share) | $ / shares     $ 0                                
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares     $ 3.5                                
Preferred Stock, Convertible, Conversion Ratio     1                                
Preferred Stock, Convertible, Maximum Common Stock Closing Price (in dollars per share) | $ / shares     $ 5                                
Gross Proceeds of Public Offering | $     $ 15,000,000                                
Series D Preferred Stock [Member] | Unit Offering [Member]                                      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.001                                  
Preferred Stock, Number in One Unit (in shares)   1                                  
Stock Issued During Period, Shares, New Issues (in shares)   4,285,714