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Note 4 - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Business Combination, Contingent Consideration, Liability, Current | $ 4,315 | $ 4,315
Estimate of Fair Value Measurement [Member] |  |
Business Combination, Contingent Consideration, Liability, Current | 4,315 | 4,315
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Business Combination, Contingent Consideration, Liability, Current | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Business Combination, Contingent Consideration, Liability, Current | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Business Combination, Contingent Consideration, Liability, Current | 4,315 | 4,315
Reported Value Measurement [Member] |  |
Business Combination, Contingent Consideration, Liability, Current | 0 | 0
Money Market Funds [Member] | Estimate of Fair Value Measurement [Member] |  |
Cash equivalents | 67,052 | 67,046
Money Market Funds [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash equivalents | 67,052 | 67,046
Money Market Funds [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash equivalents | 0 | 0
Money Market Funds [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash equivalents | 0 | 0
Money Market Funds [Member] | Reported Value Measurement [Member] |  |
Cash equivalents | $ 67,052 | $ 67,046

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- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI https://asc.fasb.org/extlink&oid=126966325&loc=d3e6819-128478 + Details
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