Note 3 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill Impairment Analysis, Period for Which Revenue, Operating Margins and Cash Flows Are Projected (Year)		5 years
Goodwill, Impairment Loss	$ 0	$ 0	$ 22,708	$ 35,944
Impairment of Intangible Assets, Finite-lived		$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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