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4) Stock-based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Details    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount $ 101,996 $ 84,452
Unrecognized compensation expense related to the options issued in December 2014 $ 273,464  
Total intrinsic value   $ 91,989