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Stock-Based Compensation (Summary of Unvested Stock Options) (Details) (USD $)
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Shares:    
Unvested, beginning of period (in shares) 63,082  
Granted (in shares) 50,000  
Vested (in shares) (28,915)  
Canceled/Forfeited (in shares) (1,333)  
Unvested, end of period (in shares) 82,834  
Weighted Average Grant Date Fair Value:    
Unvested, weighted average grant date fair value, beginning of period (in USD per share) $ 9.87  
Granted, weighted average grant date fair value (in USD per share) $ 16.78  
Vested, weighted average grant date fair value (in USD per share) $ 9.80  
Canceled/Forfeited, weighted average grant date fair value (in USD per share) $ 9.82  
Unvested, weighted average grant date fair value, end of period (in USD per share) $ 14.06  
Unrecognized compensation cost related to awards, weighted average period for recognition   18 months
Stock Options
    
Weighted Average Grant Date Fair Value:    
Unrecognized compensation cost related to stock options $ 895,174  
Unrecognized compensation cost related to awards, weighted average period for recognition 2 years 4 months 18 days  
Share-based compensation expense $ 174,270 $ 57,144