Note 5 - Offsetting of Derivative Instruments (Details) - USD ($)	May 31, 2016	Aug. 31, 2015
Foreign Exchange Contract [Member]
Gross derivative asset amounts	$ 1,094,000	$ 1,040,000
Gross derivative asset amounts offset in balance sheet	(764,000)	(5,000)
Net derivative asset amounts	330,000	1,035,000
Gross derivative liability amounts	(1,296,000)	(1,607,000)
Gross derivative liability amounts offset in balance sheet	764,000	5,000
Net derivative liability amounts	(532,000)	(1,602,000)
Gross derivative amounts	(202,000)	(567,000)
Gross derivative amounts offset in balance sheet
Fair Value Asset (Liability)	(202,000)	(567,000)
Gross derivative liability amounts	$ (44)	$ (1,602)