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Note 2 - Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended |
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Jun. 25, 2022 | Dec. 25, 2021
Gross Carrying Amount, finite-lived intangible assets | $ 306,748 | $ 316,232
Accumulated Amortization | 150,951 | 138,912
Developed Technology Rights [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | 222,240 | 229,131
Accumulated Amortization | $ 114,503 | 104,855
Remaining Useful Life (Year) | 4 years |
Customer Relationships [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | $ 64,027 | 65,916
Accumulated Amortization | $ 27,939 | 26,189
Remaining Useful Life (Year) | 7 years |
Trade Names [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | $ 20,220 | 20,877
Accumulated Amortization | $ 8,366 | 7,714
Remaining Useful Life (Year) | 6 years 9 months 18 days |
Noncompete Agreements [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | $ 261 | 308
Accumulated Amortization | $ 143 | $ 154
Remaining Useful Life (Year) | 4 years 6 months |

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- Definition 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. + References No definition available. + Details
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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 + Details
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