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Note 2 - Fair Value Measurement - Financial Assets and Liabilities on Recurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Marketable debt securities | $ 23,035 |
Fair Value, Recurring [Member] |  |
Assets | 43,111 | $ 63,873
Contingent consideration - business combinations | 3,515 | 10,027
Debt | 7,551 | 7,215
Liabilities | 11,066 | 17,242
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] |  |
Marketable debt securities | 10,335 |
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |
Marketable debt securities | 11,515 |
Fair Value, Recurring [Member] | Other Debt Obligations [Member] |  |
Marketable debt securities | 1,185 |
Fair Value, Recurring [Member] | Money Market Funds [Member] |  |
Cash equivalents | 17,086 | 63,873
Fair Value, Recurring [Member] | Corporate Debt Securities, Cash Equivalents [Member] |  |
Cash equivalents | 2,242 |
Fair Value, Recurring [Member] | Non-US Government Agency Securities, Cash Equivalents [Member] |  |
Cash equivalents | 748 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets | 27,421 | 63,873
Contingent consideration - business combinations | 0 | 0
Debt | 0 | 0
Liabilities | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities [Member] |  |
Marketable debt securities | 10,335 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] |  |
Marketable debt securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Debt Obligations [Member] |  |
Marketable debt securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member] |  |
Cash equivalents | 17,086 | 63,873
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities, Cash Equivalents [Member] |  |
Cash equivalents | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Non-US Government Agency Securities, Cash Equivalents [Member] |  |
Cash equivalents | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets | 15,690 | 0
Contingent consideration - business combinations | 0 | 0
Debt | 7,551 | 7,215
Liabilities | 7,551 | 7,215
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] |  |
Marketable debt securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |  |
Marketable debt securities | 11,515 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Debt Obligations [Member] |  |
Marketable debt securities | 1,185 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member] |  |
Cash equivalents | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities, Cash Equivalents [Member] |  |
Cash equivalents | 2,242 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Non-US Government Agency Securities, Cash Equivalents [Member] |  |
Cash equivalents | 748 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets | 0 | 0
Contingent consideration - business combinations | 3,515 | 10,027
Debt | 0 | 0
Liabilities | 3,515 | 10,027
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member] |  |
Marketable debt securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] |  |
Marketable debt securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Debt Obligations [Member] |  |
Marketable debt securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member] |  |
Cash equivalents | 0 | $ 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities, Cash Equivalents [Member] |  |
Cash equivalents | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Non-US Government Agency Securities, Cash Equivalents [Member] |  |
Cash equivalents | $ 0 |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479 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 Reference 3: 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 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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