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4) Stock-based Compensation: Schedule of stock inventive plan changes (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Class A Common Stock |  |
Shares, Outstanding | 757,684 | 972,253
Shares outstanding | $ 1.97 | $ 2.07
Shares Exercised | (138,537) |
Per Share Shares exercised | $ 2.18 |
Shares Cancelled | (76,032) |
Per Share Shares cancelled | $ 3.36 |
Options Exercisable | 757,684 |
Options exercisable | $ 1.97 |
Weighted average contractual term of options outstanding | 3.98 years |
Weighted average contractual term of options exercisable | 3.98 years |
Aggregated intrinsic value of options outstanding | $ 2,999,954 |
Aggregated intrinsic value of options exercisable | 2,999,954 |
Class C Common Stock |  |
Shares, Outstanding | 3,294,345 | 5,838,505
Shares outstanding | $ 1.78 | $ 2.18
Shares Exercised | (1,906,022) |
Per Share Shares exercised | $ 2.24 |
Shares Cancelled | (638,138) |
Per Share Shares cancelled | $ 3.33 |
Options Exercisable | 3,294,345 |
Options exercisable | $ 1.78 |
Weighted average contractual term of options outstanding | 2.12 years |
Weighted average contractual term of options exercisable | 2.12 years |
Aggregated intrinsic value of options outstanding | 1,363,863 |
Aggregated intrinsic value of options exercisable | $ 1,363,863 |

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