Fair Value Measurements - Reconciliation of Derivative Liability (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Change in value	$ (110,859)	$ (102,763)	$ 230,082	$ 2,268,798
Exchange rights
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Value, Beginning balance			28,802
Change in value			(2,200)
Value, Ending balance	26,602		26,602
Warrant
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Value, Beginning balance			1,272,802
Change in value			(230,852)
Value, Ending balance	$ 1,041,950		$ 1,041,950