Note 3 - Fair Value Measurement - Fair Value of Contingent Consideration Using Level 3 Inputs (Details) - USD ($)	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Change in fair value recognized in net loss	$ 720	$ (3,335)
Contingent Consideration Liabilities [Member]
Balance	4,456,000	10,027,000
Balance	$ 5,176,000	$ 6,692,000

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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Period Type:	instant