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Note 2 - Business Acquisitions, Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Gross Carrying Amount, finite-lived intangible assets | $ 289,632 | $ 309,615
Accumulated Amortization | 164,624 | 169,511
Developed Technology Rights [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | 209,377 | 224,253
Accumulated Amortization | $ 127,332 | 128,938
Remaining Useful Life (Year) | 3 years 6 months |
Customer Relationships [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | $ 59,959 | 64,632
Accumulated Amortization | $ 26,721 | 31,015
Remaining Useful Life (Year) | 6 years 3 months 18 days |
Trade Names [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | $ 20,061 | 20,461
Accumulated Amortization | $ 10,412 | 9,397
Remaining Useful Life (Year) | 5 years 8 months 12 days |
Noncompete Agreements [Member] |  |
Gross Carrying Amount, finite-lived intangible assets | $ 235 | 269
Accumulated Amortization | $ 159 | $ 161
Remaining Useful Life (Year) | 3 years 3 months 18 days |

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