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Basis of Presentation - Warranty (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 1,454 $ 2,687
Warranty expenditures (663) (1,137)
Warranty provisions/(adjustment) (25) 216
Ending balance $ 766 $ 1,766
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