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Note 5 - Debt Obligations (Details Textual)
1 Months Ended 3 Months Ended 7 Months Ended
May 07, 2018
USD ($)
Mar. 08, 2018
USD ($)
$ / shares
shares
Mar. 01, 2018
USD ($)
Feb. 08, 2018
USD ($)
$ / shares
shares
Jan. 16, 2018
USD ($)
$ / shares
shares
Jul. 20, 2017
USD ($)
$ / shares
May 24, 2017
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Feb. 22, 2018
$ / shares
Feb. 12, 2018
$ / shares
Dec. 11, 2017
$ / shares
Interest Expense, Debt, Total                 $ 832,408 $ 953,636        
Debt Conversion, Original Debt, Amount                 141,763        
Share Price | $ / shares       $ 0.3147 $ 0.39                  
Proceeds from Lines of Credit, Total                 390,000 $ 175,000        
Warrants Issued Concurrently to the Summer 2017 Unit Offering [Member]                            
Proceeds from Convertible Debt                 $ 80,000          
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                         $ 0.30  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | shares             1              
Class of Warrant or Right, Exercise Period             30 days              
Class of Warrant or Right, Exercise Period Condition, Number of Trading Days Common Stock Closes at or above 2 Times the Exercise Price             10 days              
Proceeds from Issuance of Units                     $ 523,700      
Line of Credit, Maturing September 1, 2019 [Member]                            
Proceeds from Lines of Credit, Total     $ 390,000                      
Line of Credit Facility, Interest Rate During Period     18.00%                      
Number of Trading Days Prior to Interest Payment Due Date if Paid by Issuance of Common Stock     20 days                      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years                      
Debt Instrument, Call Notice Period     30 days                      
Two Year Convertible Note [Member]                            
Debt Instrument, Face Amount           $ 440,000                
Debt Instrument, Interest Rate, Stated Percentage           12.00%                
Debt Instrument, Convertible, Conversion Price | $ / shares           $ 0.42                
Debt Instrument, Convertible, Number of Equity Instruments           2,000                
Proceeds from Convertible Debt           $ 400,000                
Debt Instrument, Discount Percent           10.00%                
Debt Instrument, Unamortized Discount, Total           $ 171,429                
Note Payable, Maturing March 8, 2020 [Member]                            
Debt Instrument, Call Notice Period   60 days                        
Proceeds from Notes Payable, Total   $ 50,000                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares   150,000                        
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 0.35                        
Incremental Monthly Shares Vested Per Month as Part of Warrants | shares   6,250                        
Summer 2017 Unit Offering [Member]                            
Debt Instrument, Interest Rate, Stated Percentage             12.00%              
Debt Instrument, Convertible, Conversion Price | $ / shares             $ 0.42         $ 0.30   $ 0.394
Number of Trading Days Prior to Interest Payment Due Date if Paid by Issuance of Common Stock             20 days              
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares             $ 0.65 $ 0.48 $ 0.48          
Proceeds from Issuance of Private Placement             $ 1,500,000              
Debt Conversion before Maturity, Number of Trading Days Common Stock Closes at or above 3 Times the Unit Price             10 days              
Proceeds from Issuance of Units                 $ 80,000          
Convertible Notes, Maturing April 20, 2021 [Member]                            
Debt Instrument, Interest Rate, Stated Percentage               12.00% 12.00%          
Debt Instrument, Convertible, Conversion Price | $ / shares               $ 0.30 $ 0.30          
Number of Trading Days Prior to Interest Payment Due Date if Paid by Issuance of Common Stock               20 days            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares               333,333 333,333          
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares               $ 0.48 $ 0.48          
Proceeds from Issuance of Private Placement               $ 1,500,000            
Debt Conversion before Maturity, Number of Trading Days Common Stock Closes at or above 3 Times the Unit Price               10 days            
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | shares               1 1          
Proceeds from Issuance of Units                 $ 100,000          
FirstFire Purchase Agreement [Member]                            
Stock Issued During Period, Shares, Commitment Shares | shares         75,000                  
Share Price | $ / shares         $ 0.39                  
Stock Issued During Period, Value, Commitment Fee       $ 11,498 $ 29,250                  
Number of Trading Days, Conditional Requirements, Additional Shares         20 days                  
Stock Issued During Period, Additional Commitment Shares, New Issues | shares       36,536                    
Convertible Debt [Member] | First Fire [Member]                            
Debt Instrument, Face Amount         $ 150,000                  
Debt Instrument, Interest Rate, Stated Percentage         5.00%                  
Debt Instrument, Convertible, Conversion Price | $ / shares         $ 0.394                  
Debt Instrument, Convertible, Stock Price Trigger | $ / shares         $ 0.75                  
Debt Instrument, Convertible, Threshold Trading Days         10                  
Convertible Notes Maturing on June 1, 2018, June 17, 2019, December 31, 2019 and June 20, 2020 [Member] | Subsequent Event [Member]                            
Debt Conversion, Original Debt, Amount $ 4,133,738                          
FirstFire Note [Member] | FirstFire Purchase Agreement [Member]                            
Debt Instrument, Convertible, Number of Equity Instruments         394,949                  
Summer 2017 Unit Offering [Member] | Subsequent Event [Member]                            
Proceeds From Conversion Price Reduction Option $ 478,700