Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Name:	us-gaap_ShortTermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Note 4 - Financial Instruments and Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
	May 26, 2018	Aug. 25, 2018	Nov. 25, 2017
Short-term Investments, Total		$ 22,643	$ 23,125
Minimum [Member]
Interest Rate of Certificates of Deposit	0.10%
Maximum [Member]
Interest Rate of Certificates of Deposit		2.45%
Weighted Average [Member]
Interest Rate of Certificates of Deposit		2.11%