Note 2 - Business Acquisitions, Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
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