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4) Stock-based Compensation | 6 Months Ended
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Jun. 30, 2016
Notes |
4) Stock-based Compensation | 4) Stock-Based Compensation The Company has four fixed option plans (the “2003 Plan”, the “2006 Director Plan”, the “2013 Plan” and the “2014 Director Plan”). Compensation expense for options issued of $84,026 and $125,931 has been recognized for these plans for the three months ended June 30, 2016 and 2015, respectively, and $168,478 and $211,476 for the six months ended June 30, 2016 and 2015, respectively. As of June 30, 2016, the total unrecognized compensation expense related to the options issued in December 2015 was $144,110, which is expected to be recognized over the vesting period of one year. The Company generally estimates the expected life of the options based upon the contractual term of the options adjusted for actual experience. Future volatility is estimated based upon the a weighted historical volatility of the Company’s Class A common stock and three peer company stocks over a period equal to the estimated life of the options. Common stock issued upon exercise of stock options are generally new share issuances rather than from treasury shares. A summary of the status of the Company’s stock incentive plans as of June 30, 2016, and the changes during the six months ended June 30, 2016, are presented below:
|  | Number of Class A Shares |  | Weighted Average Exercise Price |  | Number of Class C Shares |  | Weighted Average Exercise Price
Outstanding at December 31, 2015 |  | 618,261 |  | $ 3.89 |  | 577,436 |  | $ 3.54
Granted |  | - |  |  |  | - |  |
Exercised |  | (28,460) |  | 2.15 |  | - |  |
Cancelled |  | - |  |  |  | - |  |
Outstanding at June 30, 2016 |  | 589,801 |  | $ 3.97 |  | 577,436 |  | $ 3.54
As of June 30, 2016: |  |  |  |  |  |  |  |
Options exercisable |  | 519,711 |  | $ 3.65 |  | 524,936 |  | $ 3.19
As of June 30, 2016: |  |  |  |  |  |  |  |
Available options for future grant |  | 397,342 |  |  |  | 57,750 |  |
Weighted average contractual term of options |  |  |  |  |  |  |  |
outstanding at June 30, 2016 |  | 7.25 years |  |  |  | 2.25 years |  |
Weighted average contractual term of options |  |  |  |  |  |  |  |
exercisable at June 30, 2016 |  | 6.96 years |  |  |  | 2.03 years |  |
Aggregated intrinsic value of options |  |  |  |  |  |  |  |
outstanding at June 30, 2016 (1) |  | $755,390 |  |  |  | $1,001,904 |  |
Aggregated intrinsic value of options |  |  |  |  |  |  |  |
exercisable at June 30, 2016 (1) |  | $755,390 |  |  |  | $1,001,904 |  |
(1) The Company used a stock price of $4.89 as of June 30, 2016 to derive intrinsic value.
A summary of the status of the Company’s stock incentive plans as of June 30, 2015, and the changes during the six months ended June 30, 2015, are presented below:
|  | Number of Class A Shares |  | Weighted Average Exercise Price |  | Number of Class C Shares |  | Weighted Average Exercise Price
Outstanding at December 31, 2014 |  | 512,795 |  | $ 3.20 |  | 691,591 |  | $ 2.00
Granted |  | - |  |  |  | - |  |
Exercised |  | (15,406) |  | 1.89 |  | (114,023) |  | 2.14
Cancelled |  | (8,846) |  | 2.31 |  | - |  |
Outstanding at June 30, 2015 |  | 488,543 |  | $ 3.25 |  | 577,568 |  | $ 2.62
As of June 30, 2015: |  |  |  |  |  |  |  |
Options exercisable |  | 409,961 |  | $ 2.99 |  | 511,318 |  | $ 2.34
As of June 30, 2015: |  |  |  |  |  |  |  |
Available options for future grant |  | 266,649 |  |  |  | - |  |
Weighted average contractual term of options |  |  |  |  |  |  |  |
outstanding at June 30, 2015 |  | 7.37 years |  |  |  | 2.69 years |  |
Weighted average contractual term of options |  |  |  |  |  |  |  |
exercisable at June 30, 2015 |  | 6.99 years |  |  |  | 2.35 years |  |
Aggregated intrinsic value of options |  |  |  |  |  |  |  |
outstanding at June 30, 2015 (1) |  | $1,698,099 |  |  |  | $2,375,472 |  |
Aggregated intrinsic value of options |  |  |  |  |  |  |  |
exercisable at June 30, 2015 (1) |  | $1,534,777 |  |  |  | $2,242,810 |  |
(1) The Company used a stock price of $6.73 as of June 30, 2015 to derive intrinsic value.
The total intrinsic value (which is the amount by which the fair value of the underlying stock exceeds the exercise price of an option on the exercise date) of stock options exercised during the six months ended June 30, 2016 and 2015 was $91,989 and $492,740, respectively.

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