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Note 3 - Fair Value Measurement - Fair Value of Contingent Consideration Using Level 3 Inputs (Details) - USD ($) | 3 Months Ended
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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

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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition 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. + References 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 + Details
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