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Derivative Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended				3 Months Ended		3 Months Ended		0 Months Ended
	Mar. 31, 2014	May 10, 2012	Nov. 08, 2011	Oct. 11, 2011	Mar. 31, 2014 Warrants Attached to Series G Preferred Stock [Member]	Apr. 08, 2011 Warrants Attached to Series G Preferred Stock [Member]	Mar. 31, 2014 Warrants Attached to Senior Convertible Debt [Member]	Nov. 08, 2011 Warrants Attached to Senior Convertible Debt [Member]	Oct. 11, 2011 Common Stock [Member]	Mar. 31, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]
Derivative [Line Items]
Warrants issued to acquire common shares				1,800,000		525,000		1,302,083
Warrants linked to common stock, exercised									1,725,000
Warrants linked to common stock, outstanding	2,087,500				525,000		1,562,500			0	0
Warrants expiration date	Oct. 11, 2013				Apr. 13, 2014		Nov. 09, 2016
Shares available for issuance upon exercise		434,027	434,027
Original principal amount		$ 8,000,000
Issued warrants to acquire common shares		260,417

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- Definition

Date the warrants or rights are exercisable, in CCYY-MM-DD format.

+ 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)(3))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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Face (par) amount of debt instrument at time of issuance.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

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-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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