Stockholders' Equity - Summary of Information About Warrants (Detail)			3 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013 Warrant 1	Dec. 31, 2013 Warrant 2	Dec. 31, 2013 Warrant 3	Dec. 31, 2013 Warrant 4	Dec. 31, 2013 Warrant 5	Dec. 31, 2013 Warrant 6	Dec. 31, 2013 Warrant 7	Dec. 31, 2013 Warrant 8
Class Of Warrant Or Right [Line Items]
Exercise prices		1.83	70.60	5.00	5.09	1.38	4.16	3.25	2.12	1.83
Number of Warrants	3,553,551		94,897	1,118,357	341,021	50,836	1,000	1,379,571	75,000	492,869
Remaining Life in Years			3 years 4 months 24 days	10 months 24 days	10 months 24 days	2 years	3 years	2 years 7 months 6 days	4 years	4 years