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Note 8 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended
Mar. 08, 2016
Nov. 11, 2015
Oct. 29, 2015
Oct. 22, 2015
Sep. 23, 2015
Mar. 09, 2015
Jan. 29, 2015
Nov. 13, 2014
Nov. 13, 2014
Nov. 08, 2013
Mar. 31, 2016
Dec. 31, 2015
Jun. 24, 2015
Mar. 31, 2015
Feb. 28, 2015
Convertible Preferred Stock [Member] | Series A-1 Shares [Member] | Maximum [Member]                              
Maximum Ownership as a Result of Conversion   9.99%                          
Convertible Preferred Stock [Member] | Series A-1 Shares [Member]                              
Preferred Stock, Shares Authorized                     100,000 100,000      
Preferred Stock, Par or Stated Value Per Share                     $ 0.0001 $ 0.0001      
Preferred Stock, Shares Outstanding                     90,000 90,000      
Stock Issued During Period, Shares, New Issues   5,500 84,500 84,500                      
Share Price   $ 100 $ 100 $ 100                      
Proceeds from Issuance of Convertible Preferred Stock   $ 550,000 $ 8,450,000 $ 8,450,000                      
Initial Conversion Price   $ 0.30                          
Preferred Stock, Dividend Rate, Percentage   6.00%                          
Period Preceding the Dividend Payment Date   10 days                          
Liquidation Value Per Share   $ 100                          
Dividends Payable                     $ 135,000        
Convertible Preferred Stock [Member] | Series B-1 Shares [Member] | Maximum [Member]                              
Maximum Ownership as a Result of Conversion   9.99%                          
Convertible Preferred Stock [Member] | Series B-1 Shares [Member]                              
Preferred Stock, Shares Authorized                     105,000 105,000      
Preferred Stock, Par or Stated Value Per Share                     $ 0.0001 $ 0.0001      
Preferred Stock, Shares Outstanding                     105,000 105,000      
Stock Issued During Period, Shares, New Issues   105,000                          
Share Price   $ 100                          
Proceeds from Issuance of Convertible Preferred Stock   $ 10,500,000                          
Initial Conversion Price   $ 0.30                          
Preferred Stock, Dividend Rate, Percentage   2.50%                          
Period Preceding the Dividend Payment Date   10 years                          
Liquidation Value Per Share   $ 100                          
Dividends Payable                     $ 65,625        
Common Stock [Member] | Private Investor SPA [Member]                              
Stock Issued During Period, Shares, New Issues               7,974,999   12,323,668          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               5,981,251 5,981,251           5,981,250
Stock Issued During Period, Shares, Reverse Stock Splits                 2            
Warrant [Member] | Private Investor SPA [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                   12,323,668          
Warrant [Member] | Fair Value, Inputs, Level 3 [Member]                              
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3           $ 98,065                  
Fair Value Assumptions, Risk Free Interest Rate           1.66%                  
Fair Value Assumptions, Expected Term           5 years                  
Fair Value Assumptions, Expected Dividend Rate           0.00%                  
Fair Value Assumptions, Expected Volatility Rate           115.70%                  
Private Investor SPA [Member]                              
Stock Issued During Period, Value, New Issues                   $ 3,697,100          
Placement Agent Warrants [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                   985,893          
Commissions and Fees, Percent of Gross Proceeds                   8.00%          
Issued Lieu of Compensation [Member]                              
Stock Issued During Period, Shares, New Issues 100,000                            
Stock Issued During Period, Value, New Issues $ 16,000                            
Private Investor SPA [Member]                              
Stock Issued During Period, Shares, New Issues             13,956,250     12,323,668          
Stock Issued During Period, Value, New Issues               $ 1,595,000              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               11,962,501 11,962,501            
Class of Warrant or Right, Exercise Price of Warrants or Rights               $ 0.20 $ 0.20       $ 0.30    
Term Of Warrant                 5 years            
Fair Value, Inputs, Level 3 [Member] | Warrants Issued Under PISPA [Member]                              
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances                   $ 325,891          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings                     2,337        
Warrants Issued Under PISPA [Member]                              
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value                     5,141 $ 7,478      
Warrants Issued Under PISPA [Member]                              
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances                     7,478        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings                     2,337        
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value                     5,141        
Promissory Note [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         833,333                    
September 2015 Warrants [Member]                              
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 0.30                    
Term Of Warrant         5 years                    
Debt Instrument, Unamortized Discount         $ 92,199                    
Fair Value Adjustment of Warrants                     2,375        
Warrants and Rights Outstanding                     $ 99,181 96,806      
Preferred Stock, Shares Authorized                     5,000,000        
Preferred Stock, Par or Stated Value Per Share                     $ 0.0001        
Dividends Payable                     $ 200,625      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights           575,000                  
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value                     104,322        
Class of Warrant or Right, Exercise Price of Warrants or Rights           $ 0.21                  
Derivative Liability                     0 0      
Class of Warrant or Right, Vesting Term           1 year                  
Class of Warrant or Right, Nonemployee Compensation Expense                     11,625        
Warrants and Rights Outstanding                     $ 104,322 $ 104,284      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                     0