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Income Taxes - Provision for Income Tax Expense (Benefit) (Detail) - USD ($)
 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Current:    
Federal $ 261,000 $ 667,000
State 37,000 65,000
Total current 298,000 732,000
Deferred    
Federal (1,871,000) 190,000
State (154,000) 18,000
Total deferred (2,025,000) 208,000
Income tax expense (benefit) $ (1,727,000) $ 940,000