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Note 4 - Fair Value Measures (Tables)

3 Months Ended

Nov. 30, 2013

Note 4 - Fair Value Measures (Tables) [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Fair Value Measurements at Reporting Date Using
November 30, 2013		Level 1				Level 2				Level 3				Total
Assets
Corporate money market funds ⁽¹⁾		$	128,131			$	0			$	0			$	128,131
Certificates of deposit ⁽²⁾			0				13,756				0				13,756
Derivative instruments ⁽³⁾			0				443				0				443
Total assets measured at fair value		$	128,131			$	14,199			$	0			$	142,330

Liabilities
Derivative instruments ⁽³⁾		$	0			$	3,556			$	0			$	3,556
Total liabilities measured at fair value		$	0			$	3,556			$	0			$	3,556

		Fair Value Measurements at Reporting Date Using
August 31, 2013		Level 1				Level 2				Level 3				Total
Assets
Corporate money market funds ⁽¹⁾		$	156,693			$	0			$	0			$	156,693
Certificates of deposit ⁽²⁾			0				12,725				0				12,725
Total assets measured at fair value		$	156,693			$	12,725			$	0			$	169,418

Liabilities
Derivative instruments ⁽³⁾		$	0			$	7,740			$	0			$	7,740
Total liabilities measured at fair value		$	0			$	7,740			$	0			$	7,740

Reported Value Measurement [Member]

Note 4 - Fair Value Measures (Tables) [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Fair Value Measurements at Reporting Date Using
November 30, 2013		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	128,131			$	0			$	0			$	128,131
Investments			0				13,756				0				13,756
Other current assets (derivative assets)			0				443				0				443
Total assets measured at fair value		$	128,131			$	14,199			$	0			$	142,330
Accounts payable and accrued expenses		$	0			$	1,466			$	0			$	1,466
Deferred rent and other non-current liabilities			0				2,090				0				2,090
Total liabilities measured at fair value		$	0			$	3,556			$	0			$	3,556

		Fair Value Measurements at Reporting Date Using
August 31, 2013		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	156,693			$	0			$	0			$	156,693
Investments			0				12,725				0				12,725
Total assets measured at fair value		$	156,693			$	12,725			$	0			$	169,418

Accounts payable and accrued liabilities		$	0			$	3,085			$	0			$	3,085
Deferred rent and other non-current liabilities			0				4,655				0				4,655
Total liabilities measured at fair value		$	0			$	7,740			$	0			$	7,740