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Note 9 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 12, 2023
Aug. 25, 2023
Jun. 26, 2023
Jan. 03, 2023
Jun. 23, 2022
May 17, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2013
May 26, 2023
Dec. 31, 2022
Jun. 30, 2022
Apr. 08, 2021
Common Stock, Shares Authorized (in shares) 12,500,000             12,500,000   12,500,000       12,500,000    
Common Stock, Shares, Issued (in shares) 5,727,310             5,727,310   5,727,310       5,498,260    
Common Stock, Shares, Outstanding (in shares) 5,727,310             5,727,310   5,727,310       5,498,260    
Preferred Stock, Shares Authorized (in shares) 2,500,000             2,500,000   2,500,000       2,500,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001             $ 0.001   $ 0.001       $ 0.001    
Preferred Stock, Shares Issued (in shares) 0             0   0       0    
Shares Issued, Price Per Share (in dollars per share)                             $ 0.5  
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001             $ 0.001   $ 0.001     $ 0.001 $ 0.001   $ 0.001
Class of Warrant or Right, Issued During Period (in shares)                   531,250 4,363,229          
Restricted Stock Units (RSUs) [Member]                                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)                   225,604            
Share-Based Payment Arrangement, Expense               $ 143,195 $ 382,111 $ 494,292 $ 782,360          
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 822,601             $ 822,601   $ 822,601            
Restricted Stock Units (RSUs) [Member] | The 2022 Incentive Plan [Member]                                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 201,104                              
Public Offering [Member]                                
Shares Issued, Price Per Share (in dollars per share)             $ 4                  
Private Placement [Member]                                
Proceeds from Issuance of Debt           $ 6,000,000                    
Warrant Purchase Agreement [Member]                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)             3,803,133                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)             $ 3.992                  
Common Stock, Par or Stated Value Per Share (in dollars per share)             $ 0.008                  
Proceeds from Issuance or Sale of Equity, Total             $ 15,182,075                  
Private Placement Warrants [Member]                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           531,250                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 5.2                    
Class of Warrant or Right, Issued During Period (in shares)           28,846                    
The 2023 Warrants [Member]                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 531,250             531,250   531,250            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 5.2             $ 5.2   $ 5.2            
Warrants and Rights Outstanding, Term (Year) 5 years             5 years   5 years            
Director [Member]                                
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)     1,042 24,500 2,340                      
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures     $ 57,500 $ 73,500 $ 110,254                      
Director [Member] | Restricted Stock Units (RSUs) [Member]                                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 113,357                              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant                       $ 36,750        
Management [Member]                                
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)   26,042     158,330                      
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures   $ 116,667     $ 674,164                      
Board of Directors Chairman [Member] | Restricted Stock Units (RSUs) [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant                       $ 73,500        
Convertible Preferred Stock [Member]                                
Preferred Stock, Shares Issued (in shares) 0             0   0