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Note 4 - Restructuring Charges (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2026	Sep. 27, 2025	Mar. 29, 2025	Mar. 29, 2025
Restructuring Charges	$ 771		$ 6,628
Poway Volume Manufacturing Transition [Member]
Restructuring Charges		$ 400
2025 Strategic Restructuring [Member]
Restructuring Charges	$ 771		$ 6,200	$ 6,236

X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 220
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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-Name Accounting Standards Codification
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+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: