Represents description of exercise price for incentive stock options.

No definition available.

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- Definition

Percentage of board of director plan vested on first anniversary.

+ References

No definition available.

+ Details

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- Definition

Percentage of board of directors plan vested on second anniversary.

+ References

No definition available.

+ Details

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- Definition

Percentage of fourth anniversary of grant date.

+ References

No definition available.

+ Details

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- Definition

Percentage of incentive of second and third anniversary of grant date.

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Number of allocated shares held by the Employee Stock Option Plan at balance sheet date. Allocated shares are shares that have been assigned to individual participant accounts based on a known formula.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

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Period Type:	instant

- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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- Details

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- Details

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Stock Option Plans (Details Textual) (USD $)	12 Months Ended
Stock Option Plans (Details Textual) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock or Unit Option Plan Expense	$ 160,500us-gaap_StockOptionPlanExpense	$ 129,056us-gaap_StockOptionPlanExpense	$ 74,048us-gaap_StockOptionPlanExpense
Officer and Employee Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	281,000	190,000	73,000
Percentage Of Incentive Stock Options Vest On Fourth Anniversary Of Grant Date	40.00%
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	658,000
Percentage Of Incentive Stock Options Vest On Second And Third Anniversary Of Grant Date	30.00%
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Exercise Price Incentive Stock Option Description	0
Officer and Employee Plans [Member] \| Long Term Incentive Plan 2002 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Held in Employee Stock Option Plan, Allocated	220,000
Officer and Employee Plans [Member] \| Cornerstone Statutory Option Plan 1996 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Held in Employee Stock Option Plan, Allocated	1,200,000
Board Of Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	179,000	102,600
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 130,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	600,000
Board Of Directors Plan [Member] \| Long Term Incentive Plan 2002 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Held in Employee Stock Option Plan, Allocated	1,200,000
Percentage Of Board Of Directors Plan Vest On First Anniversary Of Grant Date	50.00%	50.00%	50.00%
Percentage Of Board Of Directors Plan Vest On Second Anniversary Of Grant Date	50.00%	50.00%	50.00%