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4) Stock-based Compensation (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Details |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount | $ 84,026 | $ 125,931 | $ 168,478 | $ 211,476
Unrecognized compensation expense related to the options issued in December 2014 | 144,110 |  | $ 144,110 |
Total intrinsic value | $ 91,989 | $ 492,740 |  |

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