Stock Option Plans (Details 5) (Officer and Employee Plans [Member], USD $)	12 Months Ended
Dec. 31, 2014
Number Outstanding	939,835
Options Outstanding, Weighted Average Remaining Life	6 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 3.15
Options, Number Exercisable	345,735
Options Exercisable, Weighted Average Exercise Price	$ 4.88
Exercise Price One [Member]
Exercisable Price	$ 9.23
Number Outstanding	39,910
Options Outstanding, Weighted Average Remaining Life	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 Two [Member]
Exercisable Price	$ 13.25
Number Outstanding	16,800
Options Outstanding, Weighted Average Remaining Life	1 year 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 Three [Member]
Exercisable Price	$ 15.25
Number Outstanding	11,825
Options Outstanding, Weighted Average Remaining Life	2 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 Four [Member]
Exercisable Price	$ 15.20
Number Outstanding	2,750
Options Outstanding, Weighted Average Remaining Life	2 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 Five [Member]
Exercisable Price	$ 7.99
Number Outstanding	45,000
Options Outstanding, Weighted Average Remaining Life	3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 7.99
Options, Number Exercisable	45,000
Options Exercisable, Weighted Average Exercise Price	$ 7.99
Exercise Price Six [Member]
Exercisable Price	$ 3.60
Number Outstanding	69,550
Options Outstanding, Weighted Average Remaining Life	4 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 3.60
Options, Number Exercisable	69,550
Options Exercisable, Weighted Average Exercise Price	$ 3.60
Exercise Price Seven [Member]
Exercisable Price	$ 1.70
Number Outstanding	167,000
Options Outstanding, Weighted Average Remaining Life	6 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 1.70
Options, Number Exercisable	100,200
Options Exercisable, Weighted Average Exercise Price	$ 1.70
Exercise Price Eight [Member]
Exercisable Price	$ 1.55
Number Outstanding	3,000
Options Outstanding, Weighted Average Remaining Life	6 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 1.55
Options, Number Exercisable	1,800
Options Exercisable, Weighted Average Exercise Price	$ 1.55
Exercise Price Nine [Member]
Exercisable Price	$ 1.10
Number Outstanding	5,000
Options Outstanding, Weighted Average Remaining Life	6 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 1.10
Options, Number Exercisable	3,000
Options Exercisable, Weighted Average Exercise Price	$ 1.10
Exercise Price Ten [Member]
Exercisable Price	$ 1.02
Number Outstanding	5,000
Options Outstanding, Weighted Average Remaining Life	6 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 1.02
Options, Number Exercisable	3,000
Options Exercisable, Weighted Average Exercise Price	$ 1.02
Exercise Price Eleven [Member]
Exercisable Price	$ 1.65
Number Outstanding	173,000
Options Outstanding, Weighted Average Remaining Life	7 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 1.65
Options, Number Exercisable	51,900
Options Exercisable, Weighted Average Exercise Price	$ 1.65
Exercise Price Twelve [Member]
Exercisable Price	$ 2.37
Number Outstanding	190,000
Options Outstanding, Weighted Average Remaining Life	8 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 Thirteen [Member]
Exercisable Price	$ 2.40
Number Outstanding	206,000
Options Outstanding, Weighted Average Remaining Life	9 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 2.40
Options, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	$ 0
Exercise Price Fourteen [Member]
Exercisable Price	$ 2.50
Number Outstanding	5,000
Options Outstanding, Weighted Average Remaining Life	8 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 2.50
Options, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	$ 0

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.

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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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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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

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

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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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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

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

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