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Selected Balance Sheet Data
 3 Months Ended
Dec. 31, 2011
Selected Balance Sheet Data [Abstract]  
SELECTED BALANCE SHEET DATA
4. SELECTED BALANCE SHEET DATA
    (in thousands)
                 
    December 31, 2011     September 30, 2011  
Accounts receivable, net:
               
Accounts receivable
  $ 24,634     $ 26,772  
Less allowance for doubtful accounts
    714       339  
 
           
 
  $ 23,920     $ 26,433  
 
           
Inventories:
               
Raw materials
  $ 19,387     $ 18,960  
Work in process
    471       653  
Finished goods
    5,363       4,373  
 
           
 
  $ 25,221     $ 23,986  
 
           
Inventories are stated at the lower of cost or market value, with cost determined using the first-in, first-out method.