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Selected Balance Sheet Data (Details Textual) (Amortization Expense [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2011
Jun. 30, 2011
Amortization Expense [Member]
   
Selected Balance Sheet Data (Textual) [Abstract]    
Amortization expense $ 110 $ 537