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Note 14 - Stockholders' Equity (Details Textual) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 8 Months Ended 9 Months Ended 12 Months Ended
Aug. 14, 2019
May 14, 2019
Mar. 28, 2019
Aug. 24, 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
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
May 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2015
Aug. 23, 2018
Preferred Stock, Shares Authorized                             5,000,000             5,000,000      
Preferred Stock, Par or Stated Value Per Share                             $ 0.0001             $ 0.0001      
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total                             $ 6,501 $ 5,505 $ 16,506 $ 7,509 $ 6,509 $ 16,513          
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 3.60                                        
Promissory Note [Member]                                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights             69,445                                    
Securities Purchase Agreement Warrants [Member]                                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       2,392,502                                         996,877
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 1.50                                          
Fair Value Adjustment of Warrants       $ 1,288,139                                          
September 2015 Warrants [Member]                                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       166,668                                         69,445
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 1.50                                         $ 3.60
Fair Value Adjustment of Warrants       $ 140,827                                          
Private Investor SPA [Member]                                                  
Stock Issued During Period, Shares, New Issues               664,584                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               996,877                                  
Proceeds from Issuance of Private Placement               $ 1,595,000                                  
Term Of Warrant               5 years                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights               $ 3.60                                  
Director [Member]                                                  
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total 6,111 4,235 13,820                                            
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total $ 6,501 $ 5,505 $ 16,506                                            
Certain Officers, Employees, and Contractors [Member] | Share-based Payment Arrangement, Option [Member]                                                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                             4,000                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                             3 years                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period                             7 years                    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price                             $ 1.13                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value Amount                             $ 3,956                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate                             1.55%                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term                             4 years 182 days                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate                             0.00%                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate                             83.00%                    
Conversion of Series A-1 Shares into Common Stock [Member]                                                  
Conversion of Stock, Shares Issued                                         2,500,000        
Conversion of Dividends Payable on Series A-1 Preferred Stock to Common Stock [Member]                                                  
Conversion of Dividends Payable, Shares Issued                                         248,893        
Conversion of Dividends Payable, Amount Converted                                         $ 896,015 $ 356,015    
Conversion of Series B-1 Shares into Common Stock [Member]                                                  
Conversion of Stock, Shares Issued                           2,916,668                      
Conversion of Dividends Payable on Series B-1 Preferred Stock to Common Stock [Member]                                                  
Conversion of Dividends Payable, Shares Issued                           131,229                      
Conversion of Dividends Payable, Amount Converted                           $ 472,426               $ 472,426    
Series A-1 Convertible Preferred Stock [Member]                                                  
Preferred Stock, Shares Authorized                             100,000             100,000      
Stock Issued During Period, Shares, New Issues         5,500 84,500                                   90,000  
Preferred Stock, Shares Outstanding, Ending Balance                             0             0      
Share Price         $ 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                        
Preferred Stock, Shares Issued, Total                             0             0      
Series B-1 Convertible Preferred Stock [Member]                                                  
Preferred Stock, Shares Authorized                             105,000             105,000      
Stock Issued During Period, Shares, New Issues         105,000                                     105,000  
Preferred Stock, Shares Outstanding, Ending Balance                             0             0      
Share Price         $ 100                                        
Proceeds from Issuance of Convertible Preferred Stock         $ 10,500,000                                        
Conversion of Dividends Payable, Amount Converted                 $ 55,342   $ 417,084                            
Preferred Stock, Shares Issued, Total                             0             0      
September 2015 Warrants [Member]                                                  
Term Of Warrant             5 years                                    
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 3.60