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Earnings Per Common Share (Details Textual) - $ / shares
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Shares not included in computation of earnings per common share 10,000 140,527
Exercise price of common shares $ 4.00  
Minimum [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Exercise price of common shares   $ 3.18
Maximum [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Exercise price of common shares   $ 4.60