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]
Cash and cash equivalents	$ 73,570		$ 156,693
Investments	15,217		12,725
Prepaid expense and other current assets ,other assets fair value	1,394	[1]	131
Total assets measured at fair value	90,181		169,418
Accounts payable and accrued expenses	152		3,085
Total liabilities measured at fair value	152		7,740
Fair Value, Inputs, Level 1 [Member] | Prepaid Expenses and Other Current Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	0
Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	0
Fair Value, Inputs, Level 1 [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Cash and cash equivalents	73,570		156,693
Investments	0		0
Total assets measured at fair value	73,570		156,693
Accounts payable and accrued expenses	0		0
Total liabilities measured at fair value	0		0
Fair Value, Inputs, Level 2 [Member] | Prepaid Expenses and Other Current Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	114
Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	1,280
Fair Value, Inputs, Level 2 [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Cash and cash equivalents	0
Investments	15,217
Prepaid expense and other current assets ,other assets fair value	1,394	[1]
Total assets measured at fair value	16,611		12,725
Accounts payable and accrued expenses	152
Total liabilities measured at fair value	152		7,740
Fair Value, Inputs, Level 3 [Member] | Prepaid Expenses and Other Current Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	0
Fair Value, Inputs, Level 3 [Member] | Other Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	0
Fair Value, Inputs, Level 3 [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Cash and cash equivalents	0		0
Investments	0		0
Total assets measured at fair value	0		0
Accounts payable and accrued expenses	0		0
Total liabilities measured at fair value	0		0
Prepaid Expenses and Other Current Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	114
Other Assets [Member]
Note 4 - Fair Value Measures (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Prepaid expense and other current assets ,other assets fair value	$ 1,280

[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.