Accrued Expenses and Other Current Liabilities (Schedule of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Payables and Accruals [Abstract]
Compensation	$ 2,858	$ 3,628
Warranty	791	871
Professional fees	984	761
Customer deposits	39	38
Income and other taxes	1,083	944
Severance and restructuring accruals	710	642
Other	866	800
Accrued expenses and other current liabilities	$ 7,331	$ 7,684