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Stock Option Plans (Details 5) (Officer and Employee Plans [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 3.51	$ 3.86	$ 4.63	$ 5.79
Number Outstanding	810,825	670,300	572,600	520,900
Options Outstanding, Weighted Average Remaining Life	6 years 6 months
Options Outstanding, Weighted Average Exercise Price	$ 3.51
Options, Number Exercisable	307,025	274,680	295,415
Options Exercisable, Weighted Average Exercise Price	$ 6.10
Exercise Price One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 5.44
Number Outstanding	65,640
Options Outstanding, Weighted Average Remaining Life	2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 5.44
Options, Number Exercisable	65,640
Options Exercisable, Weighted Average Exercise Price	$ 5.44
Exercise Price Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 9.23
Number Outstanding	39,910
Options Outstanding, Weighted Average Remaining Life	1 year 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 9.23
Options, Number Exercisable	39,910
Options Exercisable, Weighted Average Exercise Price	$ 9.23
Exercise Price Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 13.25
Number Outstanding	16,800
Options Outstanding, Weighted Average Remaining Life	2 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 13.25
Options, Number Exercisable	16,800
Options Exercisable, Weighted Average Exercise Price	$ 13.25
Exercise Price Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 15.25
Number Outstanding	11,825
Options Outstanding, Weighted Average Remaining Life	3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 15.25
Options, Number Exercisable	11,825
Options Exercisable, Weighted Average Exercise Price	$ 15.25
Exercise Price Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 15.20
Number Outstanding	2,750
Options Outstanding, Weighted Average Remaining Life	3 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 15.20
Options, Number Exercisable	2,750
Options Exercisable, Weighted Average Exercise Price	$ 15.20
Exercise Price Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 7.99
Number Outstanding	45,100
Options Outstanding, Weighted Average Remaining Life	4 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 7.99
Options, Number Exercisable	45,100
Options Exercisable, Weighted Average Exercise Price	$ 7.99
Exercise Price Seven [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 3.60
Number Outstanding	69,800
Options Outstanding, Weighted Average Remaining Life	5 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 3.60
Options, Number Exercisable	69,800
Options Exercisable, Weighted Average Exercise Price	$ 3.60
Exercise Price Eight [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.70
Number Outstanding	171,000
Options Outstanding, Weighted Average Remaining Life	7 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 1.70
Options, Number Exercisable	51,300
Options Exercisable, Weighted Average Exercise Price	$ 1.70
Exercise Price Nine [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.55
Number Outstanding	3,000
Options Outstanding, Weighted Average Remaining Life	7 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 1.55
Options, Number Exercisable	900
Options Exercisable, Weighted Average Exercise Price	$ 1.55
Exercise Price Ten [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.10
Number Outstanding	5,000
Options Outstanding, Weighted Average Remaining Life	7 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 1.10
Options, Number Exercisable	1,500
Options Exercisable, Weighted Average Exercise Price	$ 1.10
Exercise Price Eleven [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.02
Number Outstanding	5,000
Options Outstanding, Weighted Average Remaining Life	7 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 1.02
Options, Number Exercisable	1,500
Options Exercisable, Weighted Average Exercise Price	$ 1.02
Exercise Price Twelve [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.65
Number Outstanding	177,000
Options Outstanding, Weighted Average Remaining Life	8 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 1.65
Options, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	$ 0
Exercise Price Thirteen [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 2.37
Number Outstanding	193,000
Options Outstanding, Weighted Average Remaining Life	9 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 2.37
Options, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	$ 0
Exercise Price Fourteen [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 2.50
Number Outstanding	5,000
Options Outstanding, Weighted Average Remaining Life	9 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 2.50
Options, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	$ 0

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ 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)(1)(iii)

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

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X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: 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



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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

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X

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ 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)(1)(i)

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

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X

- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ 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)(1)(iii)

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

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X

- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ 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)(1)(i)-(ii)

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

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X

- Definition

Weighted average remaining contractual term of outstanding stock options, 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 (e)(1)

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

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