Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Derivatives designated as hedging instruments Assets: Foreign Currency Forward Contracts
Derivatives Assets designated as hedging instruments	$ 1,406	$ 131
Liabilities: Foreign Currency Forward Contracts
Derivatives Liability designated as hedging instruments	626	7,871
Prepaid Expenses and Other Current Assets [Member]
Derivatives designated as hedging instruments Assets: Foreign Currency Forward Contracts
Derivatives Assets designated as hedging instruments	114	0
Other Assets [Member]
Derivatives designated as hedging instruments Assets: Foreign Currency Forward Contracts
Derivatives Assets designated as hedging instruments	1,292	0
Accounts Payable and Accrued Liabilities [Member]
Liabilities: Foreign Currency Forward Contracts
Derivatives Liability designated as hedging instruments	591	3,085
Deferred Rent and Other Non-current Liabilities [Member]
Liabilities: Foreign Currency Forward Contracts
Derivatives Liability designated as hedging instruments	$ 0	$ 4,655