Basis of Presentation and Significant Accounting Policies - Summary of Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
PFG debt, net of discount		$ 1,347
Warrant debt		63
Derivative liability	$ 67	109
Financial liabilities		1,519
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	$ 67	109
Financial liabilities		109
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
PFG debt, net of discount		1,347
Warrant debt		63
Financial liabilities		$ 1,410