Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Aug. 30, 2015

Notes Tables

Schedule of Effect of Significant Unobservable Inputs for Investment [TableText Block]

	At August 30, 2015				At May 31, 2015
Revenue growth rates			4%				4%
Expense growth rates			4%				4%
Income tax rates			15%				15%
Discount rates		15%	to	21%		15%	to	21%

Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block]

Impact on value of Windset investment as of August 30, 2015
10% increase in revenue growth rates	$	2,100
10% increase in expense growth rates	$	(1,600	)
10% increase in income tax rates	$	—
10% increase in discount rates	$	(1,000	)

Revenue Recognition, Multiple-deliverable Arrangements [Table Text Block]

	Three months ended August 30 , 2 015		Three months ended August 31 , 201 4
Recorded upon shipment	$	110,416	$	106,240
Recorded upon acceptance in foreign port		22,344		26,587
Revenue from multiple element arrangements		1,589		575
Revenue from license fees, R&D contracts and royalties/profit sharing		1,006		212
TOTAL	$	135,355	$	133,614