Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value (USD $) In Thousands, unless otherwise specified	May 31, 2014		Aug. 31, 2013
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Corporate money market funds	$ 73,570	[1]	$ 156,693	[1]
Certificates of deposit	15,217	[2]	12,725	[2]
Derivative Instruments (3)	1,394	[3]	131
Total assets measured at fair value	90,181		169,418
Derivative instruments	152	[3]	7,740	[3]
Total liabilities measured at fair value	152		7,740
Fair Value, Inputs, Level 1 [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Corporate money market funds	73,570	[1]	156,693	[1]
Certificates of deposit	0	[2]	0	[2]
Total assets measured at fair value	73,570		156,693
Derivative instruments	0	[3]	0	[3]
Total liabilities measured at fair value	0		0
Fair Value, Inputs, Level 2 [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Corporate money market funds	0	[1]	0	[1]
Certificates of deposit	15,217	[2]	12,725	[2]
Derivative Instruments (3)	1,394	[3]
Total assets measured at fair value	16,611		12,725
Derivative instruments	152	[3]	7,740	[3]
Total liabilities measured at fair value	152		7,740
Fair Value, Inputs, Level 3 [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Corporate money market funds	0	[1]	0	[1]
Certificates of deposit	0	[2]	0	[2]
Total assets measured at fair value	0		0
Derivative instruments	0	[3]	0	[3]
Total liabilities measured at fair value	$ 0		$ 0

[1] The Company's corporate money market funds are traded in an active market and the net asset value of each fund on the last day of the quarter is used to determine its fair value. As such, the Company's corporate money market funds are classified as Level 1 and included in cash and cash equivalents on the consolidated balance sheet.

[2] The Company's certificates of deposit are held to maturity are not debt securities and are classified as Level 2. These certificates of deposit have original maturities greater than three months, but less than one year and, as such, are classified as investments (short-term) on the Company's consolidated balance sheet.

[3] 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.