Stockholders' Equity - Summary of Information about Warrants (Detail) (USD $)	9 Months Ended
	Jun. 30, 2014
Class Of Warrant Or Right [Line Items]
Number of Warrants	1,526,781
Warrant 1
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 70.60
Number of Warrants	94,897
Remaining Life in Years	2 years 10 months 24 days
Warrant 2
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 5.00
Number of Warrants	416,225
Remaining Life in Years	1 year 2 months 12 days
Warrant 3
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 5.09
Number of Warrants	291,204
Remaining Life in Years	4 months 24 days
Warrant 4
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 1.38
Number of Warrants	24,324
Remaining Life in Years	1 year 6 months
Warrant 5
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 4.16
Number of Warrants	1,000
Remaining Life in Years	2 years 6 months
Warrant 6
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 3.25
Number of Warrants	334,347
Remaining Life in Years	2 years 1 month 6 days
Warrant 7
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 2.12
Number of Warrants	75,000
Remaining Life in Years	3 years 6 months
Warrant 8
Class Of Warrant Or Right [Line Items]
Exercise prices	$ 1.83
Number of Warrants	289,784
Remaining Life in Years	3 years 6 months