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Note 8 - Stockholders' Equity (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 09, 2015
Jan. 29, 2015
Nov. 13, 2014
Nov. 08, 2013
Feb. 28, 2015
Sep. 30, 2015
Sep. 30, 2015
Sep. 23, 2015
Dec. 31, 2014
Private Investor SPA [Member] | Common Stock [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   5,981,250        
Private Investor SPA [Member] | Warrant [Member]                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       12,323,668          
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 0.50          
Private Investor SPA [Member]                  
Stock Issued During Period, Shares, Reverse Stock Splits         2        
Stock Issued During Period, Shares, New Issues       12,323,668          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     11,962,501 985,893          
Stock Issued During Period, Value, New Issues     $ 1,595,000 $ 3,697,100          
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 0.30            
Term Of Warrant     5 years 3 years          
Warrant Exercisable on Cashless Basis, Period Following Anniverary of Issuance Date       270 days          
Commissions and Fees, Percent of Gross Proceeds       8.00%          
Stock Issued During Period, Shares, Conversion of Convertible Securities     1            
Class of Warrant or Right, Number of Securities Cancelled     7,974,999            
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings           $ 20,784 $ 35,037    
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value           8,190 8,190   $ 43,227
Fair Value, Inputs, Level 3 [Member] | Placement Agent Warrants [Member]                  
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value           8,190 $ 8,190   $ 43,227
Fair Value, Inputs, Level 3 [Member] | Minimum [Member]                  
Fair Value Assumptions, Risk Free Interest Rate             0.35%    
Fair Value Assumptions, Expected Term             1 year 25 days    
Fair Value Assumptions, Expected Volatility Rate             84.40%    
Fair Value, Inputs, Level 3 [Member] | Maximum [Member]                  
Fair Value Assumptions, Risk Free Interest Rate             1.37%    
Fair Value Assumptions, Expected Term             4 years 357 days    
Fair Value Assumptions, Expected Dividend Rate                
Fair Value Assumptions, Expected Volatility Rate             115.90%    
Fair Value, Inputs, Level 3 [Member]                  
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value           $ 93,198 $ 93,198    
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%                
Minimum [Member] | New Employees [Member]                  
Fair Value Assumptions, Risk Free Interest Rate             1.44%    
Fair Value Assumptions, Expected Volatility Rate             117.00%    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price             $ 0.18    
Minimum [Member]                  
Debt Instrument, Convertible, Conversion Price     $ 0.20            
Maximum [Member] | New Employees [Member]                  
Fair Value Assumptions, Risk Free Interest Rate             1.50%    
Fair Value Assumptions, Expected Volatility Rate             118.00%    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price             $ 0.20    
Promissory Note [Member]                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               833,333  
New Employees [Member]                  
Fair Value Assumptions, Expected Term             4 years 182 days    
Fair Value Assumptions, Expected Dividend Rate             0.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross           1,103,000 1,178,000    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term             7 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value           $ 169,343 $ 169,343    
Stock Issued During Period, Shares, New Issues   13,956,250              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 575,000                
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.21                
Class of Warrant or Right, Vesting Percentage 1.00%                
Class of Warrant or Right, Nonemployee Compensation Expense           $ 4,398 $ 30,054