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4) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Class A Common Stock |  |  |  |
Shares, Outstanding | 741,973 | 589,801 | 741,973 | 618,261
Shares outstanding | $ 4.33 | $ 3.97 | $ 4.33 | $ 3.89
Shares Exercised |  | (28,460) |  |
Per Share Shares Exercised |  | $ 2.15 |  |
Options Exercisable | 671,816 | 519,711 |  |
Options exercisable | $ 4.08 | $ 3.65 |  |
Available options for future grant | $ 525,682 | $ 397,342 |  |
Weighted average contractual term of options outstanding | 6.87 years | 7.25 years |  |
Weighted average contractual term of options exercisable | 6.61 years | 6.96 years |  |
Aggregated intrinsic value of options outstanding | $ 1,564,592 | $ 755,390 |  |
Aggregated intrinsic value of options exercisable | $ 1,564,592 | $ 755,390 |  |
Class C Common Stock |  |  |  |
Shares, Outstanding | 428,669 | 577,436 | 556,298 | 577,436
Shares outstanding | $ 5.59 | $ 3.54 | $ 4.61 | $ 3.54
Shares Exercised | (103,402) |  |  |
Per Share Shares Exercised | $ 1.31 |  |  |
Shares Cancelled | (24,227) |  |  |
Per Share Shares cancelled | $ 1.31 |  |  |
Options Exercisable | 386,669 | 524,936 |  |
Options exercisable | $ 5.40 | $ 3.19 |  |
Available options for future grant | $ 227,750 | $ 57,750 |  |
Weighted average contractual term of options outstanding | 2.88 years | 2.25 years |  |
Weighted average contractual term of options exercisable | 2.71 years | 2.03 years |  |
Aggregated intrinsic value of options outstanding | $ 449,896 | $ 1,001,904 |  |
Aggregated intrinsic value of options exercisable | $ 449,896 | $ 1,001,904 |  |

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