Summary of Changes in Fair Value of Our Level 3 Liabilities (Detail) (Fair Value, Inputs, Level 3, Warrants, USD $)	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Fair Value, Inputs, Level 3 \| Warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Beginning Balance	$ 1,886,652	$ 8,362,995
New Liabilities in 2011		668,640
Unrealized (Gains) Losses	167,853	(3,176,686)
Ending Balance	$ 2,054,505	$ 5,854,949

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

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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