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Note 4 - Restructuring Charges - Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Restructuring Charges	$ 509	$ 14	$ 8,347	$ 36
Poway Volume Manufacturing Transition [Member]
Accrued restructuring, balance			0
Restructuring Charges			1,503
Amounts paid or charged			(1,490)
Accrued restructuring, balance	13		13
Poway Volume Manufacturing Transition [Member] | Employee Severance [Member]
Accrued restructuring, balance			0
Restructuring Charges			948
Amounts paid or charged			(948)
Accrued restructuring, balance	0		0
Poway Volume Manufacturing Transition [Member] | Other Restructuring [Member]
Accrued restructuring, balance			0
Restructuring Charges			555
Amounts paid or charged			(542)
Accrued restructuring, balance	13		13
2025 Strategic Restructuring [Member]
Accrued restructuring, balance			0
Restructuring Charges			6,845
Amounts paid or charged			(5,701)
Accrued restructuring, balance	1,549		1,549
Impact of currency exchange			405
2025 Strategic Restructuring [Member] | Employee Severance [Member]
Accrued restructuring, balance			0
Restructuring Charges			6,742
Amounts paid or charged			(5,598)
Accrued restructuring, balance	1,549		1,549
Impact of currency exchange			405
2025 Strategic Restructuring [Member] | Other Restructuring [Member]
Accrued restructuring, balance			0
Restructuring Charges			103
Amounts paid or charged			(103)
Accrued restructuring, balance	$ 0		0
Impact of currency exchange			$ 0

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
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-Publisher FASB
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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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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 45
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-Publisher FASB
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
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-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
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-Section 50
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-URI https://asc.fasb.org/1943274/2147476148/220-40-50-21

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
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-Section 50
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-URI https://asc.fasb.org/1943274/2147476148/220-40-50-6

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X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

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-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

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X

- Definition

Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
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-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

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