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Basis of Presentation - Warranty (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 1,454 $ 2,687
Warranty expenditures (277) (362)
Warranty expense (112) 103
Ending balance $ 1,065 $ 2,428
Minimum [Member]
   
Product Warranty [Line Items]    
Standard product warranty, period (in months) 12 months  
Maximum [Member]
   
Product Warranty [Line Items]    
Standard product warranty, period (in months) 24 months