Note 5 - Derivative Instruments (Details) - Offsetting of Derivative Instruments - USD ($) $ in Thousands		May. 31, 2015	Aug. 31, 2014
Derivatives, Fair Value [Line Items]
Net derivative asset amounts	[1]	$ 972	$ 1,406
Net derivative liability amounts	[1]	(620)	(591)
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Gross derivative asset amounts		1,424	1,406
Gross derivative asset amounts offset in balance sheet		(452)	0
Net derivative asset amounts		972	1,406
Gross derivative liability amounts		(1,072)	(626)
Gross derivative liability amounts offset in balance sheet		452	35
Net derivative liability amounts		(620)	(591)
Gross derivative amounts		352	780
Gross derivative amounts offset in balance sheet		0	35
Net derivative amounts		$ 352	$ 815

[1] The Company utilizes the income approach to measure fair value for its derivative instruments (foreign exchange forward contracts). The income approach uses pricing models that rely on market observable inputs such as spot, forward and interest rates, as well as credit default swap spreads and therefore are classified as Level 2.