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Note 8 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	May 27, 2018	May 28, 2017	May 29, 2016
Unrecognized tax benefits – beginning of the period	$ 537,000	$ 842,000	$ 987,000
Gross increases – tax positions in prior period	21,000	11,000	1,000
Gross decreases – tax positions in prior period		(90,000)	(223,000)
Gross increases – current-period tax positions	116,000	93,000	77,000
Settlements	(95,000)
Lapse of statute of limitations	(100,000)	(319,000)
Unrecognized tax benefits – end of the period	$ 479,000	$ 537,000	$ 842,000

X

- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318

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X

- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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-Publisher FASB
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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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