Stock-Based Compensation (Details 7) (Warrant [Member], USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Warrant [Member]
Number of Warrants, Beginning Balance	3,259,186	1,131,078
Number of Warrants, Granted	985,855	2,272,963
Number of Warrants, Exercised	(1,768,167)	(15,615)
Number of Warrants, Forfeited	(844,373)	(129,240)
Number of Warrants, Ending Balance	1,632,501	3,259,186
Weighted Average Exercise Price, Beginning Balance	$ 1.95	$ 3.49
Weighted Average Exercise Price, Granted	$ 1.71	$ 1.25
Weighted Average Exercise Price, Exercised	$ 1.11	$ 1.03
Weighted Average Exercise Price, Forfeited	$ 3.32	$ 2.08
Weighted Average Exercise Price, Ending Balance	$ 1.99	$ 1.95

Number of share warrants exercised during the period.

No definition available.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans are exercise in period.

+ References

No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-Paragraph 2

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