Note 11 - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended
Oct. 03, 2020	Sep. 28, 2019
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1	$ 1
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	6.00%	6.00%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of 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)(1)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant