Note 4 - Fair Value Measures (Tables)

3 Months Ended

Nov. 30, 2015

Notes Tables

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

	Fair Value Measurements at November 30, 2015
(in thousands)	Level 1		Level 2		Level 3		Total
Assets
Corporate money market funds (1)	$	101,405	$	—	$	—	$	101,405
Certificates of deposit (2)		—		23,145		—		23,145
Derivative instruments (3)		—		607		—		607
Total assets measured at fair value	$	101,405	$	23,752	$	—	$	125,157
Liabilities
Derivative instruments (3)	$	—	$	1,834	$	—	$	1,834
Total liabilities measured at fair value	$	—	$	1,834	$	—	$	1,834

	Fair Value Measurements at August 31, 2015
(in thousands)	Level 1		Level 2		Level 3		Total
Assets
Corporate money market funds (1)	$	89,443	$	—	$	—	$	89,443
Certificates of deposit (2)		—		23,497		—		23,497
Derivative instruments (3)		—		1,035		—		1,035
Total assets measured at fair value	$	89,443	$	24,532	$	—	$	113,975
Liabilities
Derivative instruments (3)	$	—	$	1,602	$	—	$	1,602
Total liabilities measured at fair value	$	—	$	1,602	$	—	$	1,602