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Stock-Based Compensation (Details Textual) (USD $)
 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Common Stock Options [Member]
Dec. 31, 2012
Common Stock Options [Member]
Dec. 31, 2011
Common Stock Options [Member]
Dec. 31, 2013
Non Executive Directors Share Plan [Member]
Dec. 31, 2012
Non Executive Directors Share Plan [Member]
Dec. 31, 2011
Non Executive Directors Share Plan [Member]
May 14, 2008
Equity Incentive Plan2008 [Member]
Jul. 31, 2011
Equity Incentive Plan2008 [Member]
Dec. 31, 2013
Redeemable Preferred Stock [Member]
Dec. 31, 2012
Redeemable Preferred Stock [Member]
Dec. 31, 2011
Redeemable Preferred Stock [Member]
Dec. 31, 2013
Redeemable Preferred Stock [Member]
Employee Stock Option [Member]
Dec. 31, 2012
Redeemable Preferred Stock [Member]
Employee Stock Option [Member]
Dec. 31, 2011
Redeemable Preferred Stock [Member]
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       6,600 5,780 5,440         18,000       10,180 10,033 7,455
Stock Issued During Period, Shares, New Issues             13,980 10,886 7,614     10,180 11,417 8,345      
Allocated Share-based Compensation Expense $ 246,473 $ 371,038 $ 494,648       $ 135,503 $ 82,649 $ 71,945                
Stock Reserved For Future Issuance                   1,500,000              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 13.94                                
Sale of Stock, Price Per Share $ 14.10                   $ 9.11            
Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Outstanding Number 70,133                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 154,211                                
Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Outstanding Weighted Average Exercise Price $ 10.36                                
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total $ 55,123                     $ 138,091          
Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Outstanding Weighted Average Remaining Contractual Term 2 years 11 months 8 days                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 1 year 3 months 11 days                                
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 11 months 8 days                     1 year 2 months 26 days