Summary of Significant Accounting Policies (Warranty) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 628	$ 1,454	$ 2,687
Warranty expenditures	(706)	(819)	(1,360)
Reserve provision/(adjustment)	871	(7)	127
Ending balance	$ 793	$ 628	$ 1,454
Minimum
Product Warranty [Line Items]
Standard product warranty, period	12 months
Maximum
Product Warranty [Line Items]
Standard product warranty, period	24 months