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Summary of Significant Accounting Policies (Details 2) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Net Income Per Common Share        
Weighted average number of shares outstanding 4,182,529 3,052,175 4,065,243 3,038,111
Effect of dilutive stock options 119,751 136,174 113,938 124,509
Diluted number of shares outstanding 4,302,280 3,188,349 4,179,181 3,162,620
Outstanding stock options not included in the calculation because the effect would be anti-dilutive 20,000 0 22,000 3,000