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Selected Balance Sheet Data (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Sep. 30, 2013
Accounts receivable, net:    
Accounts receivable $ 26,010 $ 27,142
Less allowance for doubtful accounts 110 313
Accounts receivable, net 25,900 26,829
Inventories:    
Raw materials 25,177 21,171
Work in process 203 224
Finished goods 5,212 4,745
Inventories $ 30,592 $ 26,140