Note 2 - Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 24, 2022	Dec. 25, 2021
Gross Carrying Amount, finite-lived intangible assets	$ 296,975	$ 316,232
Accumulated Amortization	154,198	138,912
Developed Technology Rights [Member]
Gross Carrying Amount, finite-lived intangible assets	214,975	229,131
Accumulated Amortization	$ 117,096	104,855
Remaining Useful Life (Year)	3 years 9 months 18 days
Customer Relationships [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 62,138	65,916
Accumulated Amortization	$ 28,381	26,189
Remaining Useful Life (Year)	6 years 9 months 18 days
Trade Names [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 19,616	20,877
Accumulated Amortization	$ 8,580	7,714
Remaining Useful Life (Year)	6 years 6 months
Noncompete Agreements [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 246	308
Accumulated Amortization	$ 141	$ 154
Remaining Useful Life (Year)	4 years 3 months 18 days

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(16))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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