Basis of Presentation - Warranty (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 793	$ 628
Warranty expenditures	(22)	(228)
Warranty provisions/(adjustment)	(5)	307
Ending balance	$ 766	$ 707
Minimum
Product Warranty [Line Items]
Standard product warranty, period (in months)	12 months
Maximum
Product Warranty [Line Items]
Standard product warranty, period (in months)	24 months