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Stock Plans - (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Stock Plans - Details        
Incentive stock plan shares authorized under 2011 Incentive Stock Plan       200,000
Compensation cost recognized $ 23,104 $ 23,104 $ 23,104  
Unrecognized compensation cost 136,018      
Aggregrate intrinsic value of options exercised 0 0 0  
Cash received from the exercise of stock options $ 0 $ 0 $ 0