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Subsequent Events (Details) (USD $) In Millions, except Share data, unless otherwise specified | 2 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | --- | ---
Feb. 28, 2013 Subsequent Event [Member] | Dec. 31, 2011 Underwritten public offering [Member] | Dec. 31, 2011 Underwritten public offering [Member] | Mar. 07, 2013 Underwritten public offering [Member] Subsequent Event [Member]
Subsequent Events (Textual) [Abstract] |  |  |  |
Shares of common stock sold under Sales Agreement | 8,222,966 |  |  |
Net proceeds from the transaction | $ 5.6 | $ 3.7 |  |
Shares of common stock reserved for issuance under underwriting agreement |  |  |  | 27,377,266
Purchase price per unit of common stock and warrant (in dollars per unit) |  | 0.5195 |  | 0.55
Number of shares called by each warrant (number of shares) |  |  |  | 0.50
Exercise price per share (in dollars per share) |  |  |  | $ 0.7936
Common stock purchase warrant |  |  |  | 13,688,633
Term of the warrants in years |  |  | 5 years | 5 years 6 months
Net proceeds expected from the issue of common shares (in dollars) |  |  |  | $ 14.0

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- Definition Class of Warrant or Right, Number of Securities Called by Each Warrant or Right + References No definition available. + Details
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- Definition Class of Warrant or Right, Securities Called by Warrants or Rights, Price Per Share + References No definition available. + Details
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- Definition Class of Warrant or Right, Term + References No definition available. + Details
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- Definition Common stock sold under sales agreement. + References No definition available. + Details
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- Definition Potential Proceeds from Issue of Common Stock + References No definition available. + Details
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- Definition Proceeds from issuance of common stock and warrants. + References No definition available. + Details
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- Definition Purchase price per unit of common stock and warrant. + References No definition available. + Details
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- Details
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- Definition The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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