Stockholders' Equity - Summary of Information about Warrants (Detail)			3 Months Ended
Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2014 Warrant 1	Mar. 31, 2014 Warrant 2	Mar. 31, 2014 Warrant 3	Mar. 31, 2014 Warrant 4	Mar. 31, 2014 Warrant 5	Mar. 31, 2014 Warrant 6	Mar. 31, 2014 Warrant 7	Mar. 31, 2014 Warrant 8
Class Of Warrant Or Right [Line Items]
Exercise price of warrant		1.83	70.60	5.00	5.09	1.38	4.16	3.25	2.12	1.83
Number of Warrants	2,533,507		94,897	995,692	291,204	24,324	1,000	746,306	75,000	305,084
Remaining Life in Years			3 years 1 month 6 days	8 months 12 days	8 months 12 days	1 year 8 months 12 days	2 years 8 months 12 days	2 years 4 months 24 days	3 years 8 months 12 days	3 years 8 months 12 days

Exercise price per share or per unit of warrants or rights outstanding.

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)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&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 4

-Article 4

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