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

6 Months Ended

Nov. 27, 2016

Notes Tables

Schedule of Effect of Significant Unobservable Inputs for Investment [Table Text Block]

	November 27, 2016		May 29, 2016
Revenue growth rates		4%		4%
Expense growth rates		4%		4%
Income tax rates		15%		15%
Discount rates		12%		12.5%

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

	Impact on value of investment in Windset as of November 27, 2016
10% increase in revenue growth rates	$	400
10% increase in expense growth rates	$	(400	)
10% increase in income tax rates	$	—
10% increase in discount rates	$	(200	)

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

	Fair Value at November 27, 2016						Fair Value at May 29, 2016
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Interest rate swap (1)	$	—	$	519	$	—	$	—	$	—	$	—
Investment in non-public company		—		—		62,700		—		—		62,700
Total	$	—	$	519	$	62,700	$	—	$	—	$	62,700

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

	Three Months Ended				Six Months Ended
	November 27, 2016		November 29, 2015		November 27, 2016		November 29, 2015
Recorded upon shipment	$	107,987	$	112,709	$	214,152	$	223,125
Recorded upon acceptance in foreign port		25,701		22,140		49,040		44,484
Revenue from multiple element arrangements		1,683		4,058		3,268		5,647
Revenue from license fees, R&D contracts and royalties/profit sharing		494		1,534		1,799		2,540
Total	$	135,865	$	140,441	$	268,259	$	275,796