Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014		Aug. 31, 2013
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Corporate money market funds	$ 75,363	[1]	$ 156,693	[1]
Certificates of deposit	20,008	[2]	12,725	[2]
Derivative Instruments (3)	1,406		131
Total assets measured at fair value	96,777		169,418
Derivative instruments	591	[3]	7,740	[3]
Total liabilities measured at fair value	591		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	75,363	[1]	156,693	[1]
Certificates of deposit	0	[2]	0	[2]
Derivative Instruments (3)	0	[3]
Total assets measured at fair value	75,363		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	20,008	[2]	12,725	[2]
Derivative Instruments (3)	1,406	[3]
Total assets measured at fair value	21,414		12,725
Derivative instruments	591	[3]	7,740	[3]
Total liabilities measured at fair value	591		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]
Derivative Instruments (3)	0
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 held for investment 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 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.