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Derivative Financial Instruments - Changes in Fair Value Inputs and Assumptions (Detail) (USD $)			12 Months Ended
	Dec. 31, 2013	Oct. 11, 2010	Dec. 31, 2013 Warrant Derivatives [Member]	Dec. 31, 2012 Warrant Derivatives [Member]
Derivative [Line Items]
Beginning balance			$ 3,826,619	$ 4,653,160
Issuances:
Series G Convertible Preferred Stock Financing
Senior Convertible Note Financing	9,955,000	928,481		363,542
Exercises:
Series G Convertible Preferred Stock Financing			(922,875)	(118,500)
Changes in fair value inputs and assumptions reflected in income			(1,980,164)	(1,071,583)
Ending balance			$ 923,580	$ 3,826,619

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Fair value measurement with unobservable inputs reconciliation recurring basis liability exercise.

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Fair value of warrants issued.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9



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Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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