Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2013
Schedule of Product Warranty Accruals [Abstract]
Balance at beginning of period	$ 5,364	$ 6,350	$ 4,561	$ 4,100
Provision for product warranty - expense	289	214	1,851	2,615
Adjustments and utilization of warranty accrual	(1,648)	(1,539)	(2,407)	(1,690)
Current portion	3,474	4,821	3,474	4,821	4,030
Non-current portion	531	204	531	204
Balance at end of period	$ 4,005	$ 5,025	$ 4,005	$ 5,025