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Basis of Presentation - Warranty (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 628	$ 1,454
Warranty expenditures	(368)	(496)
Warranty provisions/(adjustment)	791	(200)
Ending balance	$ 1,051	$ 758
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

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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