Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
Sep. 25, 2020	Sep. 27, 2019
Benefit plan adjustments, income taxes	$ 177	$ 169
Unrealized loss on cash flow hedge, income taxes	$ 22	$ (44)

Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration