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Derivatives (Tables)
 3 Months Ended
Mar. 31, 2015
Derivatives [Abstract]  
Schedule of derivative warrant instruments activity

  Shares subject to warrants  Fair Value 
       
Balance, December 31, 2014  1,649,329  $6,709,911 
         
Transfer from liability to equity classification  (21,960)  (48,691)
         
Change in fair value  -   (4,796,378)
         
Balance, March 31, 2015  1,627,369  $1,864,842 
Summary of fair values of derivative warrants on basis of valuation model


  March 31,  December 31, 
  2015  2014 
       
Market value of common stock on measurement date (1) $2.47  $5.89 
Adjusted exercise price $2.48  $2.48 
Risk free interest rate (2)  0.89%  1.10%
Warrant lives in years  2.75 years   3.00 years 
Expected volatility (3)  72%  71%
Expected dividend yield (4)  -   - 
Probability of stock offering in any period over 5 years (5)  100%  100%
Offering price (6) $4.50  $4.50 

(1)The market value of common stock at the above measurement dates is based on the Company’s trading price quoted on the NYSE MKT.

  

(2)The risk-free interest rate was determined by management using the Treasury Bill rate as of the respective measurement date.

 

(3)Because the Company does not have adequate trading history to determine its historical trading volatility, the volatility factor was estimated by management using the historical volatilities of comparable companies in the same industry and region.

 

(4)Management determined the dividend yield to be 0% based upon its expectation that it will not pay dividends for the foreseeable future.
  
(5)Management determines the probability of future stock offering at each evaluation date.
  
(6)Represents the estimated offering price in future offerings as determined by management.