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Note 7 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended 2163 Months Ended
Mar. 05, 2026
Mar. 05, 2026
Mar. 04, 2026
Jan. 09, 2026
Jan. 02, 2026
Nov. 05, 2025
May 05, 2025
Apr. 25, 2025
Mar. 17, 2025
Feb. 07, 2025
Jun. 26, 2022
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2205
Dec. 31, 2025
Dec. 22, 2025
Nov. 24, 2025
Preferred Stock, Shares Authorized (in shares)                       25,000,000     25,000,000    
Common Stock, Shares Authorized, Increase (in shares)               6,500,000                  
Proceeds from Issuance of Convertible Preferred Stock                       $ 2,250,000 $ 0        
Payments of Dividends                       $ 853,679 (0)        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                       $ 0.001     $ 0.001    
Proceeds from Issuance or Sale of Equity                       $ 2,750,000          
Accrued Expenses Settled With Warrants                       0 350,000        
Restricted Stock Units (RSUs) [Member]                                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grant Date Fair Value                       812,642 151,640        
Share-Based Payment Arrangement, Expense                       74,609 49,880        
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount                       $ 744,000 $ 137,886        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Month)                       36 months 15 months        
Conversion of Series F Preferred Stock into Common Stock [Member]                                  
Conversion of Stock, Shares Converted (in shares)                       2,759 2,410        
Conversion of Stock, Shares Issued (in shares)                       3,235,983 2,190,908        
Debt Conversion, Converted Instrument, Rate                       0.8526% 1.10%        
Conversions of Series G Preferred Stock Into Common Stock [Member]                                  
Conversion of Stock, Shares Converted (in shares)                       7,940 0        
Conversion of Stock, Shares Issued (in shares)                       9,010,144 0        
Debt Conversion, Converted Instrument, Rate                       0.8526% 1.00%        
Conversion of Convertible Note Into Common Stock [Member]                                  
Debt Conversion, Converted Instrument, Shares Issued (in shares)                       0 700,000        
Debt Conversion, Original Debt, Amount                       $ 0 $ 770,000        
Debt Instrument, Convertible, Average Conversion Rate (in dollars per share)                       $ 0   $ 1.1      
Series F Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                       $ 0.8526       $ 0.9615  
Stock Issued During Period, Shares, Warrant Exercises (in shares)                       1,128,050          
Proceeds from Warrant Exercises, Net                       $ 961,775          
Class of Warrant or Right, Cashless Exercise (in shares)                       671,797          
Cashless Series F Warrants [Member]                                  
Stock Issued During Period, Shares, Warrant Exercises (in shares)                       358,806          
Class of Warrant or Right, Cashless Exercise (in shares)                       671,797          
Class of Warrant or Right, Cashless Exercise Price (in dollars per share)                       $ 0.8526          
Series B Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                         $ 1.9445        
Stock Issued During Period, Shares, Warrant Exercises (in shares)                         267,849        
Proceeds from Warrant Exercises, Net                         $ 520,833        
Accrued Expenses Settled With Warrants                         350,000        
Proceeds From Warrant Settlement                         $ 171,000        
Maximum [Member] | Series F Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                         $ 5.25        
Alpha [Member] | Series F Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         586,441       415,420 450,390              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 0.8526       $ 1.2036 $ 2.2203              
Warrants and Rights Outstanding, Term (Year)         3 years       3 years 3 years              
Series F Convertible Preferred Stock [Member]                                  
Preferred Stock, Shares Authorized (in shares)                     35,000 35,000     35,000    
Preferred Stock, Stated Value Per Share (in dollars per share)                     $ 1,000 $ 1,000          
Stock Issued During Period, Shares, New Issues (in shares)                       500          
Preferred Stock, Convertible, Conversion Price (in dollars per share)                               0.9615  
Dividends                       $ 30,997 $ 67,651        
Dividends Payable                       $ 125,850     $ 948,532    
Preferred Stock, Dividend Rate, Percentage                       5.00%          
Payments of Dividends       $ 853,679                          
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                       $ 0.001     $ 0.001    
Preferred Stock, Shares Outstanding (in shares)                       1,863     4,122    
Series F Convertible Preferred Stock [Member] | Securities Purchase Agreement [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)         500                        
Proceeds from Issuance of Warrants         $ 500,000                        
Preferred Stock, Convertible, Shares Issuable (in shares)         586,441                        
Preferred Stock, Convertible, Conversion Price (in dollars per share)         $ 0.8526                        
Series F Convertible Preferred Stock [Member] | Maximum [Member]                                  
Preferred Stock, Convertible, Conversion Price (in dollars per share)                         $ 5.25        
Series F Convertible Preferred Stock [Member] | Alpha [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)             500   500 1,000 10,000            
Preferred Stock, Convertible, Conversion Price (in dollars per share)                 $ 1.2036 $ 2.2203              
Proceeds from Issuance of Convertible Preferred Stock                 $ 500,000 $ 1,000,000              
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)                 415,420 450,390              
Series F Convertible Preferred Stock [Member] | Alpha [Member] | Maximum [Member]                                  
Equity Issuance, Maximum Additional Stated Value Issuable                     $ 25,000,000            
Series G Convertible Preferred Stock [Member]                                  
Preferred Stock, Shares Authorized (in shares)                       100,000     100,000    
Preferred Stock, Stated Value Per Share (in dollars per share)                       $ 1,000          
Stock Issued During Period, Shares, New Issues (in shares)                       85,250          
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                       $ 0.001     $ 0.001    
Preferred Stock, Shares Outstanding (in shares)                       500     6,190    
Series G Convertible Preferred Stock [Member] | Series G Certificate of Designation [Member]                                  
Preferred Stock, Shares Authorized (in shares)           100,000                      
Preferred Stock, Stated Value Per Share (in dollars per share)           $ 1,000                      
Stock Issued During Period, Shares, New Issues (in shares) 2,000   250     12,000                      
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 1 $ 1       $ 1.23           $ 0.8526       0.9615 $ 1.1347
Preferred Stock, Par or Stated Value Per Share (in dollars per share)           $ 0.001                      
Proceeds from Issuance or Sale of Equity   $ 2,250,000       $ 11,507,338                      
Preferred Stock, Shares Outstanding (in shares)                       6,190          
Preferred Stock, Shares Issued (in shares)                       14,250          
Preferred Stock, Capital Shares Reserved for Future Issuance (in shares)                       85,750          
Series G Convertible Preferred Stock [Member] | Series G Certificate of Designation [Member] | Series G Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                               $ 0.9615