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	9 Months Ended
	May 31, 2014
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	$ (594)	[1]
Remaining Expense to be Recognized	1,006
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	736	[1]
Remaining Expense to be Recognized	2,055
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	1,704	[1]
Remaining Expense to be Recognized	$ 2,687

[1] Amounts represent the cumulative catch-up adjustment to be recorded if there was a change in the vesting percentage as of May 31, 2014.