Note 5 - Derivatives in Cash Flow Hedging Relationships (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - Foreign Exchange Contract [Member] - Selling, General and Administrative Expenses [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Foreign currency forward contracts	$ 3,900	$ (1,903)	$ 404	$ (929)
Foreign currency forward contracts	$ (12)	$ (277)	$ 40	$ (468)