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Stock Options (Details 1) (USD $)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Weighted average fair value of options granted $ 1.89 $ 2.37
Risk-free interest rate 0.76% 0.65%
Expected life (years)   5 years
Expected volatility factor 67.37% 68.61%
Expected dividends 0.00% 0.00%
Minimum [Member]
   
Expected life (years) 5 years  
Maximum [Member]
   
Expected life (years) 7 years