Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 1,664	$ 2,816	$ 3,881
Provision for product warranty - expense	376	838	1,308
Adjustments and utilization of warranty accrual	(1,169)	(1,990)	(2,373)
Balance at end of period	$ 871	$ 1,664	$ 2,816