Note 4 - Fair Value Measures (Tables)

6 Months Ended

Feb. 28, 2018

Notes Tables

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

	Fair Value Measurements at February 28, 2018
(in thousands)	Level 1		Level 2		Level 3		Total
Assets
Corporate money market funds (1)	$	35,472	$	—	$	—	$	35,472
Mutual funds (2)		—		20,243		—		20,243
Certificates of deposit ( 3 )		—		11,315		—		11,315
Derivative instruments (4)		—		3,921		—		3,921
Total assets measured at fair value	$	35,472	$	35,479	$	—	$	70,951
Liabilities
Derivative instruments (4)	$	—	$	—	$	—	$	—
Total liabilities measured at fair value	$	—	$	—	$	—	$	—

	Fair Value Measurements at August 31, 2017
(in thousands)	Level 1		Level 2		Level 3		Total
Assets
Corporate money market funds (1)	$	26,677	$	—	$	—	$	26,677
Mutual Funds (2)		—		18,364		—		18,364
Certificates of deposit (3)		—		14,080		—		14,080
Derivative instruments (4)		—		6,142		—		6,142
Total assets measured at fair value	$	26,677	$	38,586	$	—	$	65,263
Liabilities
Derivative instruments (4)	$	—	$	—	$	—	$	—
Total liabilities measured at fair value	$	—	$	—	$	—	$	—