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10. Stock Based Compensation (Details 1) (USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Dividend-yield 0.00% 0.00%
Market price of the common stock   $ 3.20
Minimum [Member]
   
Risk-free interest rate 0.44% 0.18%
Expected volatility 69.33% 74.83%
Expected life (years) 9 months 18 days 6 months
Market price of the common stock $ 4.20  
Maximum [Member]
   
Risk-free interest rate 0.74% 0.42%
Expected volatility 82.28% 142.90%
Expected life (years) 3 years 3 years
Market price of the common stock $ 9.54