Product Warranty Obligation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Product Warranties Disclosures [Abstract]
Warranty period, minimum	1 year
Warranty period, maximum	5 years
Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 1,063	$ 1,021
Warranties issued	146	50
Settlements made	(196)	(136)
Ending balance	$ 1,013	$ 935