Product Warranty Obligation (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
Product Warranties Disclosures [Abstract]
Warranty period, minimum			1 year
Warranty period, maximum			5 years
Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 972	$ 925	$ 1,063	$ 1,021
Warranties issued	105	331	427	484
Settlements made	(177)	(124)	(590)	(373)
Ending balance	$ 900	$ 1,132	$ 900	$ 1,132