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Summary of Significant Accounting Policies (Details 3) - shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Net (Loss) Income Per Common Share    
Weighted average number of shares outstanding 4,949,213 4,225,789
Effect of dilutive stock options 110,440
Diluted number of shares outstanding 4,949,213 4,336,229
Outstanding stock options not included in the calculation because the effect would be anti-dilutive 360,000 34,250