Note 5 - Fair Value Amounts of Derivative Instruments and Gains (Details) - Foreign Exchange Contract [Member] - USD ($) $ in Thousands	Feb. 29, 2016	Aug. 31, 2015
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Gross derivative asset amounts		$ 1,035
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accounts Payable and Accrued Liabilities [Member]
Accounts payable and accrued expenses	$ 2,624
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Deferred Rent and Other Noncurrent Liabilities [Member]
Accounts payable and accrued expenses	1,490	$ 1,602
Gross derivative asset amounts	177	1,040
Accounts payable and accrued expenses	$ 4,291	$ 1,607