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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]  
Schedule of net income (loss) per common share

 

  Year Ended December 31, 
  2015  2014  2013 
Weighted average number of shares outstanding  3,042,376   3,027,001   3,019,407 
Effect of dilutive stock options  123,359   0   65,641 
Diluted number of shares outstanding  3,165,735   3,027,001   3,085,048 
Outstanding stock options not included in the calculation            
    because the effect would be anti-dilutive  6,000   253,000   63,875