Note 13 - Investments (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 24, 2023	Jun. 25, 2022	Jun. 24, 2023	Jun. 25, 2022
Proceeds from Sale and Maturity of Marketable Securities	$ 0	$ 0	$ 5,300	$ 11,526
Marketable Securities, Gain (Loss)	100	(300)	100	(400)
Marketable Security, Unrealized Gain (Loss)	$ 100	$ (300)	$ 100	$ (400)

Amount of unrealized gain (loss) on investment in marketable security.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Name:	us-gaap_MarketableSecuritiesUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration