Product Warranty Obligation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Product Warranties Disclosures [Abstract]
Warranty period, minimum			1 year
Warranty period, maximum			5 years
Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 923	$ 972	$ 862	$ 1,063
Warranties issued	276	105	773	427
Settlements made	(192)	(177)	(628)	(590)
Ending balance	$ 1,007	$ 900	$ 1,007	$ 900