Stock-Based Compensation (Details) (USD $)	12 Months Ended
Dec. 31, 2012
Summary of options outstanding by exercise price range
Options Outstanding, Number Outstanding at 12/31/12	1,715,200
Options Outstanding, Weighted Average Remaining Contractual Life (years)	6 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 5.04
Options Exercisable, Number Exercisable at 12/31/12	855,979
Options Exercisable, Weighted Average Exercise Price	$ 5.65
Stock Options [Member] \| Range 1 [Member]
Summary of options outstanding by exercise price range
Range of Exercise Price, Lower Range Limit	$ 4.25
Range of Exercise Price, Upper Range Limit
Options Outstanding, Number Outstanding at 12/31/12	1,475,000
Options Outstanding, Weighted Average Remaining Contractual Life (years)	6 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 4.25
Options Exercisable, Number Exercisable at 12/31/12	814,028
Options Exercisable, Weighted Average Exercise Price	$ 4.25
Stock Options [Member] \| Range 2 [Member]
Summary of options outstanding by exercise price range
Range of Exercise Price, Lower Range Limit	$ 4.26
Range of Exercise Price, Upper Range Limit	$ 7.00
Options Outstanding, Number Outstanding at 12/31/12	29,000
Options Outstanding, Weighted Average Remaining Contractual Life (years)	6 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 5.05
Options Exercisable, Number Exercisable at 12/31/12	30,751
Options Exercisable, Weighted Average Exercise Price	$ 5.27
Stock Options [Member] \| Range 3 [Member]
Summary of options outstanding by exercise price range
Range of Exercise Price, Lower Range Limit	$ 7.01
Range of Exercise Price, Upper Range Limit	$ 125.00
Options Outstanding, Number Outstanding at 12/31/12	11,200
Options Outstanding, Weighted Average Remaining Contractual Life (years)	1 year 8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 108.75
Options Exercisable, Number Exercisable at 12/31/12	11,200
Options Exercisable, Weighted Average Exercise Price	$ 108.75

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

+ References

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans 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)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- 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.

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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.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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