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Note M - 401(k) Profit-sharing Plan (Details Textual) - USD ($)	12 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 29, 2018
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 2,390,000	$ 2,433,000	$ 2,106,000

X

- Definition

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

+ References

No definition available.

+ Details

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