Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Schedule of Product Warranty Accruals [Abstract]
Balance at beginning of period	$ 2,816	$ 3,881	$ 3,100
Provision for product warranty - expense	838	1,308	2,619
Adjustments and utilization of warranty accrual	(1,990)	(2,373)	(1,838)
Balance at end of period	1,664	2,816	3,881
Current portion	1,664	2,285	3,350
Non-current portion	$ 0	$ 531	$ 531