Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	Aug. 31, 2013
Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains [Line Items]
Derivatives designated as hedging instruments	$ 2,726	$ 7,871
Accounts Payable and Accrued Liabilities [Member]
Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains [Line Items]
Derivatives designated as hedging instruments	1,316	3,085
Deferred Rent and Other Non-current Liabilities [Member]
Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains [Line Items]
Derivatives designated as hedging instruments	$ 1,178	$ 4,655