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Warrant Liability (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Class of Warrant or Right [Line Items]
Warrant liability, fair value	$ 1,871,000	$ 1,871,000
Changes in fair value of warrants	$ 863,000	$ 1,244,000
Expected term		10 months 13 days	1 year 7 months 10 days
Common stock market price (in dollars per share)	$ 4.41	$ 4.41	$ 2.20
Risk-free interest rate (in hundredths)		0.17%	0.19%
Expected volatility (in hundredths)		74.94%	69.98%
Resulting fair value (per warrant) (in dollars per share)	$ 0.93	$ 0.93	$ 0.32

X

- Definition

Represents the amount of gain (loss) attributable to changes in fair value of warrants which are included in earnings for the period

+ References

No definition available.

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X

- Definition

The fair value (per warrant) of each class of warrants option or rights outstanding using an option pricing model.

+ References

No definition available.

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X

- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 15

-Paragraph 83

-URI http://asc.fasb.org/extlink&oid=6913464&loc=d3e34841-113949



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 10

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 6

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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-Name Accounting Standards Codification

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Risk-free interest rate assumption used in valuing an instrument.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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-Topic 820

-SubTopic 10

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