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Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense (July 2012 Performance Based [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2013
Financial Performance Level One [Member]
 
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]  
Cumulative Catch-up Adjustment    [1]
Remaining Expense to be Recognized    [2]
Financial Performance Level Two [Member]
 
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]  
Cumulative Catch-up Adjustment (361) [1]
Remaining Expense to be Recognized 0
Financial Performance Level Three [Member]
 
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]  
Cumulative Catch-up Adjustment 448 [1]
Remaining Expense to be Recognized 2,391
Financial Performance Level Four [Member]
 
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]  
Cumulative Catch-up Adjustment 848 [1]
Remaining Expense to be Recognized 3,591
Financial Performance Level Five [Member]
 
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]  
Cumulative Catch-up Adjustment 1,358 [1]
Remaining Expense to be Recognized $ 4,681
[1] Amounts represent the cumulative catch-up adjustment to be recorded if there was a change in the vesting percentage as of August 31, 2013.
[2] The first 20% of the grant vested during fiscal 2013, and as such, there is no remaining expense to be recognized as of August 31, 2013.