Quarterly report pursuant to Section 13 or 15(d)

Convertible Notes Payable - Fair Value Measurements, Valuation Assumptions of Embedded Conversion Feature and Warrants (Details)

v3.2.0.727
Convertible Notes Payable - Fair Value Measurements, Valuation Assumptions of Embedded Conversion Feature and Warrants (Details) - $ / shares
 6 Months Ended 12 Months Ended
Jan. 05, 2015
Dec. 16, 2014
Nov. 19, 2014
Mar. 19, 2014
Aug. 02, 2013
Jun. 30, 2015
Dec. 31, 2014
Jun. 19, 2015
Debt Instrument, Redemption [Line Items]                
Common stock closing price               $ 2.50
Convertible Debt [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price $ 1.75 $ 1.53 $ 1.7 $ 3.87 $ 4.15      
Conversion per share price $ 1.33 $ 1.3 $ 1.45 $ 3.29 $ 3.73      
Conversion shares 112,402 77,061 172,672 151,999 804,764      
Expected life (in years) 3 years 3 years 3 years 1 year 3 years      
Expected volatility 73.00% 74.00% 74.00% 62.00% 110.00%      
Call option value $ 0.97 $ 0.81 $ 0.9 $ 1.19 $ 2.82      
Risk-free interest rate 0.90% 1.10% 1.10% 0.15% 0.59%      
Dividends 0.00% 0.00% 0.00% 0.00% 0.00%      
Convertible Debt One [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price $ 1.75           $ 1.73  
Conversion per share price $ 1.33           $ 1.49  
Conversion shares 749,344           2,008,032  
Expected life (in years) 3 years           1 year 7 months 6 days  
Expected volatility 73.00%           64.00%  
Call option value $ 0.97           $ 0.64  
Risk-free interest rate 0.90%           0.67%  
Dividends 0.00%           0.00%  
Convertible Debt Two [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price             $ 1.73  
Conversion per share price             $ 1.47  
Conversion shares             340,020  
Expected life (in years)             2 months 12 days  
Expected volatility             66.00%  
Call option value             $ 0.35  
Risk-free interest rate             0.40%  
Dividends             0.00%  
Convertible Debt Three [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price             $ 1.73  
Conversion per share price             $ 1.26  
Conversion shares             199,177  
Expected life (in years)             2 years 10 months 24 days  
Expected volatility             74.00%  
Call option value             $ 0.77  
Risk-free interest rate             1.10%  
Dividends             0.00%  
Convertible Debt Four [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price             $ 1.73  
Conversion per share price             $ 1.26  
Conversion shares             77,061  
Expected life (in years)             3 years  
Expected volatility             74.00%  
Call option value             $ 0.78  
Risk-free interest rate             1.10%  
Dividends             0.00%  
Convertible Debt Five [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price                
Conversion per share price                
Conversion shares                
Expected volatility                
Call option value                
Risk-free interest rate                
Dividends                
Convertible Debt Six [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price           $ 2.47    
Conversion per share price           $ 2.47    
Conversion shares           1,216,989    
Expected life (in years)           1 year 1 month 6 days    
Expected volatility           65.00%    
Call option value           $ 0.66    
Risk-free interest rate           0.28%    
Dividends           0.00%    
Convertible Debt Seven [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price                
Conversion per share price                
Conversion shares                
Expected volatility                
Call option value                
Risk-free interest rate                
Dividends                
Convertible Debt Eight [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price                
Conversion per share price                
Conversion shares                
Expected volatility                
Call option value                
Risk-free interest rate                
Dividends                
Convertible Debt Nine [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price           $ 2.47    
Conversion per share price           $ 2.16    
Conversion shares           46,318    
Expected life (in years)           2 years 8 months 12 days    
Expected volatility           68.00%    
Call option value           $ 1.12    
Risk-free interest rate           1.07%    
Dividends           0.00%    
Convertible Debt Ten [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price           $ 2.47    
Conversion per share price           $ 2.16    
Conversion shares           69,477    
Expected life (in years)           2 years 9 months 18 days    
Expected volatility           68.00%    
Call option value           $ 1.13    
Risk-free interest rate           1.02%    
Dividends           0.00%    
Convertible Debt Eleven [Member]                
Debt Instrument, Redemption [Line Items]                
Common stock closing price           $ 2.47    
Conversion per share price           $ 2.16    
Conversion shares           463,177    
Expected life (in years)           2 years 9 months 18 days    
Expected volatility           68.00%    
Call option value           $ 1.13    
Risk-free interest rate           1.02%    
Dividends           0.00%