Note 5 - Fair Value Amounts of Derivative Instruments and Gains (Details) - USD ($)	May 31, 2016	Aug. 31, 2015
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Gross derivative asset amounts	$ 76,000	$ 1,035,000
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Gross derivative asset amounts	254,000
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Deferred Rent and Other Noncurrent Liabilities [Member]
Derivative liabilities	488,000
Foreign Exchange Contract [Member]
Gross derivative asset amounts	1,094,000	1,040,000
Derivative liabilities	1,296,000	1,607,000
Derivative liabilities	$ 44	$ 1,602