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Stock Option Plans | 12 Months Ended
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Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Note 14. Stock Option Plans Cornerstone has stock option plans which are more fully described below. For the years ended December 31, 2014, 2013 and 2012, Cornerstone recognized $160,500, $129,056 and $74,048, respectively, in compensation expense for all stock options. For the years ended December 31, 2014, 2013, and 2012, the fair value of each option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
Dividend yield |  | 0.0 | % | 0.0 | % | 0.0 | %
Expected life |  | 8.5 years |  | 7.0 years |  | 7.0 years |
Expected volatility |  | 45.73 | % | 47.60 | % | 44.62 | %
Risk-free interest rate |  | 2.32 | % | 1.23 | % | 1.44 | %
The expected volatility is based upon historical volatility. The risk-free interest rates for periods within the contractual life of the awards are based on the U.S. Treasury yield curve in effect at the time of the grant. The expected life is based on historical exercise experience. The dividend yield assumption is based on Cornerstone’s history and expectation of dividend payouts. Board of Directors Plan: Cornerstone has a stock option plan under which members of the Board of Directors, at the formation of the Bank, were granted options to purchase a total of up to 600,000 shares of common stock. Only non-qualified stock options could be granted under the Plan. In addition, members of the Board of Directors could be issued options under the Cornerstone 2002 Long-Term Incentive Plan to purchase up to 1,200,000 shares of Cornerstone stock. The options available for issuance to Board members under the 2002 Long-Term Incentive Plan are shared with officers and employees of Cornerstone. The exercise price of each option equals the market price of Cornerstone’s stock on the date of grant and the option’s maximum term is ten years, at which point they expire. Vesting for options granted during 2014, 2013, and 2012 are 50% on each of the first and second anniversary of the grant date with full vesting occurring at the second anniversary date. At December 31, 2014, the total remaining compensation cost to be recognized on non-vested options is approximately $130,000. An analysis of this stock option plan is presented in the following table:
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
|  |  |  |  | Average |  | Aggregate |  |  |  |  | Average |  |  |  |  | Average |
|  |  |  |  | Exercise |  | Intrinsic |  |  |  |  | Exercise |  |  |  |  | Exercise |
|  | Shares |  | Price |  | Value(1) |  | Shares |  | Price |  | Shares |  | Price |
Outstanding at beginning of year |  |  | 190,250 |  | $ | 3.07 |  |  | 145,250 |  | $ | 3.30 |  |  | 55,250 |  | $ | 5.98 |  |  |  |
Granted |  |  | 80,000 |  |  | 2.40 |  |  | 45,000 |  | $ | 2.37 |  |  | 90,000 |  | $ | 1.65 |  |  |  |
Exercised |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  |  |
Forfeited |  |  | 16,000 |  |  | 5.44 |  |  | - |  |  | - |  |  | - |  |  | - |  |  |  |
Outstanding at end of year |  |  | 254,250 |  | $ | 2.71 |  | $ | 264,500 |  |  | 190,250 |  | $ | 3.07 |  |  | 145,250 |  | $ | 3.30 |
Options exercisable at year-end |  |  | 151,750 |  | $ | 2.93 |  | $ | 170,550 |  |  | 100,250 |  | $ | 4.03 |  |  | 55,250 |  | $ | 5.98 |
Weighted-average fair value of options granted during the year |  | $ | 1.30 |  |  |  |  |  |  |  | $ | 1.17 |  |  |  |  | $ | 0.78 |  |  |  |
| (1) | The aggregate intrinsic value of a stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on December 31, 2014. This amount changes based on changes in the market value of Cornerstone's stock.
Information pertaining to options outstanding at December 31, 2014, is as follows:
|  |  |  |  | Options Outstanding |  | Options Exercisable |
|  |  |  |  | Weighted |  | Weighted |  |  |  | Weighted |
|  |  |  |  | Average |  | Average |  |  |  | Average |
Exercise |  | Number |  | Remaining |  | Exercise |  | Number |  | Exercise |
Prices |  | Outstanding |  | Life |  | Price |  | Exercisable |  | Price |
$ | 9.23 |  | 8,000 |  | 0.2 Years |  | $ | 9.23 |  | 8,000 |  | $ | 9.23 |
| 7.99 |  | 12,800 |  | 3.2 Years |  |  | 7.99 |  | 12,800 |  |  | 7.99 |
| 3.60 |  | 18,450 |  | 4.2 Years |  |  | 3.60 |  | 18,450 |  |  | 3.60 |
| 2.40 |  | 80,000 |  | 9.2 Years |  |  | 2.40 |  | - |  |  | 2.40 |
| 2.37 |  | 45,000 |  | 8.2 Years |  |  | 2.37 |  | 22,500 |  |  | 2.37 |
| 1.65 |  | 90,000 |  | 7.2 Years |  |  | 1.65 |  | 90,000 |  |  | 1.65 |
Outstanding at end of year |  | 254,250 |  | 7.4 Years |  | $ | 2.71 |  | 151,750 |  | $ | 2.93 |
Information pertaining to non-vested options for the year ended December 31, 2014, is as follows:
|  |  |  | Weighted Average |
|  | Number |  | Grant Date |
|  | of Shares |  | Fair Value |
Non-vested options, December 31, 2013 |  | 90,000 |  | $ | 0.98 |
Granted |  | 80,000 |  |  | 1.30 |
Vested |  | (67,500) |  |  | 0.91 |
Forfeited |  | - |  |  | - |
Non-vested options, December 31, 2014 |  | 102,500 |  | $ | 1.27 |
The total fair value of shares that vested during 2014 and 2013 was approximately $179,000 and $102,600, respectively. Officer and Employee Plans: Cornerstone has two stock option plans, the 1996 Cornerstone Statutory and Non-statutory Option Plan and the Cornerstone 2002 Long-Term Incentive Plan, under which officers and employees could be granted incentive stock options or non-qualified stock options to purchase a total of up to 220,000 and 1,200,000 shares, respectively, of Cornerstone’s common stock. The option price for incentive stock options shall be not less than 100 percent of the fair market value of the common stock on the date of the grant. The non-qualified stock options may be equal to or more or less than the fair market value of the common stock on the date of the grant. The stock options vest at 30 percent on the second and third anniversaries of the grant date and 40 percent on the fourth anniversary of the grant date. These options expire ten years from the grant date. At December 31, 2014, the total remaining compensation cost to be recognized on non-vested options is approximately $658,000. An analysis of the activity for each of the years ended December 31, 2014, 2013 and 2012, for this stock option plan follows:
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
|  |  |  |  | Average |  | Aggregate |  |  |  |  | Average |  |  |  |  | Average |
|  |  |  |  | Exercise |  | Intrinsic |  |  |  |  | Exercise |  |  |  |  | Exercise |
|  | Shares |  | Price |  | Value(1) |  | Shares |  | Price |  | Shares |  | Price |
Outstanding at beginning of year |  |  | 810,825 |  | $ | 3.51 |  |  | 670,300 |  | $ | 3.86 |  |  | 572,600 |  | $ | 4.63 |  |  |  |
Granted |  |  | 207,000 |  | $ | 2.40 |  |  | 203,000 |  | $ | 2.37 |  |  | 202,000 |  | $ | 1.65 |  |  |  |
Exercised |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  |  |
Forfeited |  |  | (77,990) |  | $ | 4.89 |  |  | (62,475) |  | $ | 3.40 |  |  | (104,300) |  | $ | 3.89 |  |  |  |
Outstanding at end of year |  |  | 939,835 |  | $ | 3.15 |  | $ | 953,940 |  |  | 810,825 |  | $ | 3.51 |  |  | 670,300 |  | $ | 3.86 |
Options exercisable at year-end |  |  | 345,735 |  | $ | 4.88 |  | $ | 264,144 |  |  | 307,025 |  | $ | 6.10 |  |  | 274,680 |  | $ | 6.82 |
Weighted-average fair value of options granted during the year |  | $ | 1.30 |  |  |  |  |  |  |  | $ | 1.17 |  |  |  |  | $ | 0.78 |  |  |  |
| (1) | The aggregate intrinsic value of a stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on December 31, 2014. This amount changes based on changes in the market value of Cornerstone's stock.
Information pertaining to options outstanding at December 31, 2014, is as follows:
|  |  | Options Outstanding |  | Options Exercisable |
|  |  |  |  | Weighted |  | Weighted |  |  |  | Weighted |
|  |  |  |  | Average |  | Average |  |  |  | Average |
Exercise |  | Number |  | Remaining |  | Exercise |  | Number |  | Exercise |
Prices |  | Outstanding |  | Life |  | Price |  | Exercisable |  | Price |
$ | 9.23 |  | 39,910 |  | 0.2 Years |  | $ | 9.23 |  | 39,910 |  | $ | 9.23 |
| 13.25 |  | 16,800 |  | 1.2 Years |  |  | 13.25 |  | 16,800 |  |  | 13.25 |
| 15.25 |  | 11,825 |  | 2.2 Years |  |  | 15.25 |  | 11,825 |  |  | 15.25 |
| 15.20 |  | 2,750 |  | 2.3 Years |  |  | 15.20 |  | 2,750 |  |  | 15.20 |
| 7.99 |  | 45,000 |  | 3.2 Years |  |  | 7.99 |  | 45,000 |  |  | 7.99 |
| 3.60 |  | 69,550 |  | 4.2 Years |  |  | 3.60 |  | 69,550 |  |  | 3.60 |
| 1.70 |  | 167,000 |  | 6.2 Years |  |  | 1.70 |  | 100,200 |  |  | 1.70 |
| 1.55 |  | 3,000 |  | 6.3 Years |  |  | 1.55 |  | 1,800 |  |  | 1.55 |
| 1.10 |  | 5,000 |  | 6.6 Years |  |  | 1.10 |  | 3,000 |  |  | 1.10 |
| 1.02 |  | 5,000 |  | 6.8 Years |  |  | 1.02 |  | 3,000 |  |  | 1.02 |
| 1.65 |  | 173,000 |  | 7.2 Years |  |  | 1.65 |  | 51,900 |  |  | 1.65 |
| 2.37 |  | 190,000 |  | 8.2 Years |  |  | 2.37 |  | - |  |  | - |
| 2.40 |  | 206,000 |  | 9.2 Years |  |  | 2.40 |  | - |  |  | - |
| 2.50 |  | 5,000 |  | 8.6 Years |  |  | 2.50 |  | - |  |  | - |
Outstanding at end of year | 939,835 |  | 6.8 Years |  | $ | 3.15 |  | 345,735 |  | $ | 4.88 |
Information pertaining to non-vested options for the year ended December 31, 2014, is as follows:
|  |  |  | Weighted Average |
|  | Number |  | Grant Date |
|  | of Shares |  | Fair Value |
Non-vested options, December 31, 2013 |  | 503,800 |  | $ | 0.98 |
Granted |  | 207,000 |  |  | 1.30 |
Vested |  | (107,400) |  |  | 0.87 |
Forfeited |  | (9,300) |  |  | 1.01 |
Non-vested options, December 31, 2014 |  | 594,100 |  | $ | 1.11 |
The total fair value of shares that vested during 2014, 2013 and 2012, was approximately $281,000, $190,000, and $73,000, respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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