Note 11 - Employee Benefit Plans - Plan Valuation Assumptions (Details) - Supplemental Employee Retirement Plan [Member]	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.75%	3.00%	4.00%
Rate of increase in compensation levels	3.00%	3.00%	3.00%

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(2)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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