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Note 4 - Fair Value Measures (Tables)

12 Months Ended

Aug. 31, 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
August 31, 2013		Level 1				Level 2				Level 3				Total
Assets
Corporate money market funds ⁽¹⁾		$	156,693			$	-			$	-			$	156,693
Certificates of deposit ⁽²⁾			-				12,725				-				12,725
Total assets measured at fair value		$	156,693			$	12,725			$	-			$	169,418

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

		Fair Value Measurements at Reporting Date Using
August 31, 2012		Level 1				Level 2				Level 3				Total
Assets
Corporate money market funds ⁽¹⁾		$	160,169			$	-			$	-			$	160,169
Certificates of deposit ⁽²⁾			-				13,919				-				13,919
Total assets measured at fair value		$	160,169			$	13,919			$	-			$	174,088

Liabilities
Derivative instruments ⁽³⁾		$	-			$	2,374			$	-			$	2,374
Total liabilities measured at fair value		$	-			$	2,374			$	-			$	2,374

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
August 31, 2013		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	156,693			$	-			$	-			$	156,693
Investments			-				12,725				-				12,725
Total assets measured at fair value		$	156,693			$	12,725			$	-			$	169,418

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

		Fair Value Measurements at Reporting Date Using
August 31, 2012		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	160,169			$	-			$	-			$	160,169
Investments			-				13,919				-				13,919
Total assets measured at fair value		$	160,169			$	13,919			$	-			$	174,088

Accounts payable and accrued liabilities		$	-			$	2,374			$	-			$	2,374
Total liabilities measured at fair value		$	-			$	2,374			$	-			$	2,374