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Securities Authorized for Issuance under Equity Compensation Plans (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Securities Authorized for Issuance Under Equity Compensation Plans (Textual)    
Stock option exercised 30,000  
Total Number of shares received in connection with net exercise feature of options 21,600  
Number of shares withhold in connection with net exercise feature of options 4,519  
Shares issued to option holders 25,481  
Stock compensation expense $ 0 $ 0
Unrecognized compensation expense related to stock options $ 0  
Stock awards issued 0 0