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Financing Obligation (Financing Obligation) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Commitments and Contingencies Disclosure [Abstract]    
Financing obligation payable in monthly installments of $269 at August 31, 2012, including principal and interest, with two percent annual increases (imputed interest at 7.7%), through June 2025 $ 29,507 $ 30,364
Less current portion (992) (857)
Total financing obligation, less current portion 28,515 29,507
Monthly payment of financing obligation $ 269  
Annual increase to base payment 2.00%  
Imputed interest 7.70%  
Expiration date June 2025