Note M - 401(k) Profit-sharing Plan (Details Textual) - USD ($)	12 Months Ended
Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 2,106,000	$ 2,084,000	$ 1,936,000

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

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