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Note 5 - Summary of Share-based Compensation Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Share-based compensation expense	$ 717	$ 964	$ 2,121	$ 2,645
The above compensation is net of tax benefits	265	70	1,131	822
Share-based Payment Arrangement, Option [Member]
Share-based compensation expense	512	890	1,505	2,267
Stock Purchase Plan [Member]
Share-based compensation expense	171	57	513	328
Stock Issued to Outside Directors [Member]
Share-based compensation expense	11	17	33	50
Restricted Stock [Member]
Share-based compensation expense	$ 23	$ 0	$ 70	$ 0

X

- Definition

Amount, after tax, of expense for award under share-based payment arrangement.

+ References

No definition available.

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X

- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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