Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 899	$ 1,102	$ 871	$ 1,664
Provision for product warranty - expense	185	68	488	302
Adjustments and utilization of warranty accrual	(286)	(196)	(561)	(992)
Balance at end of period	$ 798	$ 974	$ 798	$ 974