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Note Q - Equity (Details Textual) - USD ($)
 1 Months Ended 2 Months Ended 5 Months Ended 12 Months Ended
Aug. 24, 2018
Aug. 22, 2018
Nov. 11, 2015
Oct. 29, 2015
Sep. 23, 2015
Nov. 13, 2014
May 31, 2018
Apr. 30, 2018
Mar. 31, 2018
Oct. 31, 2017
Sep. 30, 2017
May 23, 2018
May 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2015
Mar. 31, 2020
Mar. 12, 2020
Feb. 13, 2020
Aug. 23, 2018
Preferred Stock, Shares Authorized (in shares)                           5,000,000              
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                           $ 0.0001              
Share Price (in dollars per share)                           $ 0.50              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 3.60                                    
Payments of Stock Issuance Costs                           $ 361,273 $ 143,945            
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total                           $ 35,013 $ 37,532            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)                           0 0            
Subsequent Event [Member]                                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                                   $ 0.65      
Subsequent Event [Member] | Convertible Note Due in July 13, 2020 [Member]                                          
Debt Instrument, Convertible, Conversion Price (in dollars per share)                                       $ 1.15  
Promissory Note [Member]                                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         69,445                                
Amended Note [Member] | Subsequent Event [Member] | Senior Secured Convertible Note [Member]                                          
Debt Instrument, Convertible, Conversion Price (in dollars per share)                                     $ 0.65    
Common Stock [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)                             1,380,000            
Conversion of Stock, Shares Issued (in shares)                             98,893            
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)                           36,897 20,976            
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total                           $ 3 $ 2            
Director [Member] | Common Stock [Member]                                          
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)                           36,897 20,976            
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total                           $ 35,013 $ 37,532            
Securities Purchase Agreement Warrants [Member]                                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 1.50                                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 2,392,502                                       996,877
Fair Value Adjustment of Warrants $ 1,288,139                                        
September 2015 Warrants [Member]                                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 1.50                                       $ 3.60
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 166,668                                       69,445
Fair Value Adjustment of Warrants $ 140,827                                        
Public Offering [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares) 1,380,000                                        
Units Issued During Period, Units, New Issues (in shares)   1,200,000                                      
Number of Common Shares Called, Per Unit (in shares)   1                                      
Shares Issued, Price Per Share (in dollars per share)   $ 1.50                                      
Warrants and Rights Outstanding, Term (Year)   5 years                                      
Proceeds from Issuance or Sale of Equity, Total $ 2,070,000                                        
Payments for Commissions, Percent 7.00%                                        
Payments for Commissions $ 144,900                                        
Payments for Underwriting Expenses for Issuance or Sale of Equity 50,000                                        
Proceeds from Issuance or Sale of Equity, Net, Total $ 1,875,100                                        
Public Offering [Member] | August 2018 Warrants [Member]                                          
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   0.75                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 1.50                                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 1,035,000                                        
Over-Allotment Option [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)   180,000                                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   135,000                                      
Private Investor SPA [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)           664,584                              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 3.60                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           996,877                              
Proceeds from Issuance of Private Placement           $ 1,595,000                              
Term Of Warrant (Year)           5 years                              
Conversion from Series A-1 Preferred Stock to Common Stock [Member]                                          
Conversion of Stock, Shares Converted (in shares)                               27,404          
Conversion of Stock, Shares Issued (in shares)                         1,738,778     761,222          
Conversion of Dividends Payable on Series A-1 Preferred Stock to Common Stock [Member]                                          
Conversion of Dividends Payable, Amount Converted                         $ 356,015 356,015            
Conversion of Dividends Payable, Shares Issued (in shares)                         98,893                
Conversion of Series B-1 Shares into Common Stock [Member]                                          
Conversion of Stock, Shares Issued (in shares)                       2,916,668                  
Conversion of Dividends Payable on Series B-1 Preferred Stock to Common Stock [Member]                                          
Conversion of Dividends Payable, Amount Converted                       $ 472,426   $ 472,426            
Conversion of Dividends Payable, Shares Issued (in shares)                       131,229                  
Series A-1 Convertible Preferred Stock [Member]                                          
Preferred Stock, Shares Authorized (in shares)                           100,000              
Stock Issued During Period, Shares, New Issues (in shares)     5,500 84,500                         90,000        
Preferred Stock, Shares Outstanding, Ending Balance (in shares)                           0              
Share Price (in dollars per share)     $ 100 $ 100                                  
Proceeds from Issuance of Convertible Preferred Stock     $ 550,000 $ 8,450,000                                  
Conversion of Dividends Payable, Amount Converted             $ 25,463 $ 330,552   $ 540,000         $ 540,000          
Conversion of Stock, Shares Issued (in shares)                               150,000          
Conversion of Stock, Shares Converted (in shares)             23,508 39,088   27,404                    
Preferred Stock, Shares Issued, Total (in shares)                           0 0            
Series B-1 Convertible Preferred Stock [Member]                                          
Preferred Stock, Shares Authorized (in shares)                           105,000              
Stock Issued During Period, Shares, New Issues (in shares)     105,000                           105,000        
Preferred Stock, Shares Outstanding, Ending Balance (in shares)                           0              
Share Price (in dollars per share)     $ 100                                    
Proceeds from Issuance of Convertible Preferred Stock     $ 10,500,000                                    
Conversion of Dividends Payable, Amount Converted             $ 55,342   $ 417,084                        
Conversion of Stock, Shares Converted (in shares)             44,580   60,420                        
Preferred Stock, Shares Issued, Total (in shares)                           0 0            
September 2015 Warrants [Member]                                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 3.60                                
Term Of Warrant (Year)         5 years