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Warrants to Purchase Common Shares Outstanding (Detail) | Dec. 31, 2011
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Class of Warrant or Right [Line Items] |
Amount | 21,106,363
Exercise Price | 1.48
Warrant issued on 4/27/07 |
Class of Warrant or Right [Line Items] |
Amount | 17,500
Exercise Price | 17.90
Expiration Date | 1/17/14
Warrant issued on 6/1/07 |
Class of Warrant or Right [Line Items] |
Amount | 55,737
Exercise Price | 7.20
Expiration Date | 5/31/12
Warrant issued on 12/5/07 |
Class of Warrant or Right [Line Items] |
Amount | 516,300
Exercise Price | 1.17
Expiration Date | 12/3/12
Warrant issued on 7/31/09 |
Class of Warrant or Right [Line Items] |
Amount | 138,888
Exercise Price | 1.00
Expiration Date | 7/30/14
Warrant issued on 7/31/09 |
Class of Warrant or Right [Line Items] |
Amount | 1,666,000
Exercise Price | 1.00
Expiration Date | 7/30/14
Warrant issued on 10/16/09 |
Class of Warrant or Right [Line Items] |
Amount | 18,064,888
Exercise Price | 1.50
Expiration Date | 10/15/14
Warrant issued on 10/16/09 |
Class of Warrant or Right [Line Items] |
Amount | 647,050
Exercise Price | 1.50
Expiration Date | 10/15/14

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- Definition Class of Warrant or Right, Expiration Date + References No definition available. + Details
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- Definition The exercise price of each class of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph i -Subparagraph 4 Reference 2: 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)(4)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 + Details
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- Definition Aggregate amount of each class of warrants or rights outstanding. + 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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph i Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 + Details
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