Note 4. Fair Value Measures (Tables)

3 Months Ended

Nov. 30, 2011

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

	Fair Value Measurements at Reporting Date
November 30, 2011		Level 1		Level 2		Level 3		Total
Assets
Corporate money market funds (1)		$	170,621	$	0	$	0	$	170,621
Certificates of deposit (2)		$	0	$	13,792	$	0	$	13,792
Total assets measured at fair value		$	170,621	$	13,792	$	0	$	184,413
Liabilities
Derivative instruments (3)		$	0	$	2,442	$	0	$	2,442
Total liabilities measured at fair value		$	0	$	2,442	$	0	$	2,442
	Fair Value Measurements at Reporting Date
August 31, 2011			Level 1		Level 2		Level 3		Total
Assets
Corporate money market funds (1)		$	161,168	$	0	$	0	$	161,168
Derivative instruments (3)			0		897		0		897
Total assets measured at fair value		$	161,168	$	897	$	0	$	162,065
Liabilities
Derivative instruments (3)		$	0	$	0	$	0	$	0
Total liabilities measured at fair value		$	0	$	0	$	0	$	0

	Fair Value Measurements at Reporting Date
November 30, 2011		Level 1		Level 2		Level 3		Total
Cash and cash equivalents		$	170,621	$	0	$	0	$	170,621
Investments (short-term)		$	0	$	13,792	$	0	$	13,792
Total assets measured at fair value		$	170,621	$	13,792	$	0	$	184,413
Accounts payable and accrued liabilities (derivative liabilities)		$	0	$	2,442	$	0	$	2,442
Total liabilities measured at fair value		$	0	$	2,442	$	0	$	2,442
	Fair Value Measurements at Reporting Date
August 31, 2011			Level 1		Level 2		Level 3		Total
Cash and cash equivalents		$	161,168	$	0	$	0	$	161,168
Other current assets (derivative assets)			0		897		0		897
Total assets measured at fair value		$	161,168	$	897	$	0	$	162,065
Accounts payable and accrued liabilities (derivative liabilities)		$	0	$	0	$	0	$	0
Total liabilities measured at fair value		$	0	$	0	$	0	$	0