Note 5 - Derivative Instruments (Details) - Offsetting of Derivative Instruments (USD $) In Thousands, unless otherwise specified	May 31, 2014		Aug. 31, 2013
Offsetting of Derivative Instruments [Abstract]
Fair value of assets	$ 1,578		$ 131
Fair value of assets	(184)		0
Fair value of assets	1,394	[1]	131
Fair value of liabilities	(304)		(7,871)
Fair value of liabilities	152		0
Fair value of liabilities	(152)	[1]	(7,740)	[1]
Total	1,274		(7,740)
Total	(32)		0
Total	$ 1,242		$ (7,740)

[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.