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Selected Balance Sheet Data (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Sep. 30, 2013
Accounts receivable, net:    
Accounts receivable $ 24,978 $ 27,142
Less allowance for doubtful accounts 324 313
Accounts receivable, net 24,654 26,829
Inventories:    
Raw materials 26,213 21,171
Work in process 61 224
Finished goods 4,209 4,745
Inventories $ 30,483 $ 26,140