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Stock Options (Details 1) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average fair value of options granted (in dollars per share) $ 1.55 $ 1.86
Risk-free interest rate 1.53% 0.76%
Expected life (years) 5 years 5 years
Expected volatility factor 54.96% 67.00%
Expected dividends 0.00% 0.00%