Fair Value Measurements (Tables)

9 Months Ended

Feb. 28, 2015

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Our assets measured at fair value on a recurring basis were determined as follows:

	February 28, 2015
	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
SERP
Money market fund	$	166	$	—	$	—	$	166
Mutual funds	3,334		—		—		3,334
Total assets measured at fair value	$	3,500	$	—	$	—	$	3,500
Liabilities
Foreign exchange forward contracts	$	—	$	4	$	—	$	4
Total liabilities measured at fair value	$	—	$	4	$	—	$	4

	May 31, 2014
	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
SERP
Money market fund	$	323	$	—	$	—	$	323
Mutual funds	3,095		—		—		3,095
Foreign exchange forward contracts	—		9		—		9
Total assets measured at fair value	$	3,418	$	9	$	—	$	3,427