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5) Stock-based Compensation (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Details            
Share-based Payment Arrangement, Amount Capitalized $ 65,037 $ 64,704 $ 58,053 $ 58,087 $ 129,741 $ 116,140
Unrecognized compensation expense related to the options issued in December 2014 $ 108,915       108,915  
Total intrinsic value         $ 15,220 $ 111,157