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Accrued Expenses - Accrued Expenses (Detail) - USD ($)
Sep. 30, 2015
Sep. 30, 2014
Payables and Accruals [Abstract]    
Payroll and related accruals $ 894,000 $ 974,000
Warranty and related accruals 204,000 368,000
Professional fees 97,000 84,000
Other 257,000 263,000
Accrued expenses $ 1,452,000 $ 1,689,000