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Share-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Assumptions Used to Calculate Black-Scholes Option Pricing Model for Stock Options Granted

The following table illustrates the various assumptions used to calculate the Black-Scholes option pricing model for stock options granted during the three month periods ended:

 

     March 31,
2015
    March 31,
2014
 

Weighted-average risk-free interest rates:

     1.74     2.01

Dividend yield:

     —          —     

Weighted-average expected life of the option:

     7 years        7 years   

Weighted-average expected stock price volatility:

     95     95

Weighted-average fair value of the options granted:

   $ 0.44      $ 0.42