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4) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Class A Common Stock |  |  |  |  |
Shares, Outstanding | 589,801 | 488,543 | 488,543 | 618,261 | 512,795
Shares outstanding | $ 3.97 | $ 3.25 | $ 3.25 | $ 3.89 | $ 3.20
Shares Exercised | (28,460) |  | (15,406) |  |
Per Share Shares Exercised | $ 2.15 |  | $ 1.89 |  |
Shares Cancelled |  |  | (8,846) |  |
Per Share Shares cancelled |  |  | $ 2.31 |  |
Options Exercisable | 519,711 | 409,961 | 409,961 |  |
Options exercisable | $ 3.65 | $ 2.99 | $ 2.99 |  |
Available options for future grant | $ 397,342 | $ 266,649 |  |  |
Weighted average contractual term of options outstanding | 7.25 years | 7.37 years |  |  |
Weighted average contractual term of options exercisable | 6.96 years | 6.99 years |  |  |
Aggregated intrinsic value of options outstanding | $ 755,390 | $ 1,698,099 | $ 1,698,099 |  |
Aggregated intrinsic value of options exercisable | $ 755,390 | $ 1,534,777 | $ 1,534,777 |  |
Class C Common Stock |  |  |  |  |
Shares, Outstanding | 577,436 | 577,568 | 577,568 | 577,436 | 691,591
Shares outstanding | $ 3.54 | $ 2.62 | $ 2.62 | $ 3.54 | $ 2.00
Shares Exercised |  |  | (114,023) |  |
Per Share Shares Exercised |  |  | $ 2.14 |  |
Options Exercisable | 524,936 | 511,318 | 511,318 |  |
Options exercisable | $ 3.19 | $ 2.34 | $ 2.34 |  |
Available options for future grant | $ 57,750 |  |  |  |
Weighted average contractual term of options outstanding | 2.25 years | 2.69 years |  |  |
Weighted average contractual term of options exercisable | 2.03 years | 2.35 years |  |  |
Aggregated intrinsic value of options outstanding | $ 1,001,904 | $ 2,375,472 | $ 2,375,472 |  |
Aggregated intrinsic value of options exercisable | $ 1,001,904 | $ 2,242,810 | $ 2,242,810 |  |

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