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Earnings Per Share (Details Textual) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share (Textual)        
Warrants shares are excluded from calculations of dilutive net income per share 820,312 820,312 820,312 820,312