Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of period	$ 1,924	$ 4,729	$ 2,816	$ 3,881
Provision for product warranty - expense	192	0	707	1,296
Adjustments and utilization of warranty accrual	(393)	(1,652)	(1,800)	(2,100)
Balance at end of period	1,723	3,077	1,723	3,077
Current portion	1,723	2,546	1,723	2,546	$ 2,285
Non-current portion	$ 0	$ 531	$ 0	$ 531