Income Taxes - Reconciliation of Income Tax Expense (Benefit) Computed at Country Specific Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income tax expense (benefit) at statutory rate	$ (1,502)	$ (582)
State income tax expense (benefit)	(131)	(53)
Foreign tax activity	56	40
R&D tax credit expiration		82
Permanent differences, net	189	212
Adjustment of temporary differences to income tax returns	523	121
Change in valuation allowance	972	1,284
Income tax expense	$ 107	$ 1,104