Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 871	$ 1,664
Provision for product warranty - expense	88	146
Adjustments and utilization of warranty accrual	(168)	(246)
Balance at end of period	$ 791	$ 1,564