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Note 2 - Fair Value Measurement (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
As of June 30, 2022 |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market accounts |  | $ | 17,086 |  |  | $ | - |  |  | $ | - |  |  | $ | 17,086 |
Corporate debt securities |  |  | - |  |  |  | 2,242 |  |  |  | - |  |  |  | 2,242 |
Non-U.S. government agency securities |  |  | - |  |  |  | 748 |  |  |  | - |  |  |  | 748 |
Marketable debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities |  |  | 10,335 |  |  |  | - |  |  |  | - |  |  |  | 10,335 |
Corporate debt securities |  |  | - |  |  |  | 11,515 |  |  |  | - |  |  |  | 11,515 |
Other debt securities |  |  | - |  |  |  | 1,185 |  |  |  | - |  |  |  | 1,185 |
Total |  |  | 27,421 |  |  |  | 15,690 |  |  |  | - |  |  |  | 43,111 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration - business combinations |  |  | - |  |  |  | - |  |  |  | 3,515 |  |  |  | 3,515 |
Debt |  |  | - |  |  |  | 7,551 |  |  |  | - |  |  |  | 7,551 |
Total |  | $ | - |  |  | $ | 7,551 |  |  | $ | 3,515 |  |  | $ | 11,066 |
As of December 31, 2021 |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market accounts |  | $ | 63,873 |  |  | $ | - |  |  | $ | - |  |  | $ | 63,873 |
Total |  |  | 63,873 |  |  |  | - |  |  |  | - |  |  |  | 63,873 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration - business combinations |  |  | - |  |  |  | - |  |  |  | 10,027 |  |  |  | 10,027 |
Debt |  |  | - |  |  |  | 7,215 |  |  |  | - |  |  |  | 7,215 |
Total |  | $ | - |  |  | $ | 7,215 |  |  | $ | 10,027 |  |  | $ | 17,242 |
Warrant Liabilities [Member] |
Notes Tables |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Six Months Ended |
|  | June 30, |
(In thousands) |  | 2022 |  |  | 2021 |
Beginning balance |  | $ | - |  |  | $ | 2,780 |
Exercised warrants |  |  | - |  |  |  | (2,901 | )
Change in fair value recognized in net (loss) income |  |  | - |  |  |  | 121 |
Ending balance |  | $ | - |  |  | $ | - |
Contingent Consideration Liabilities [Member] |
Notes Tables |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Six Months Ended |
|  | June 30, |
(In thousands) |  | 2022 |  |  | 2021 |
Beginning balance |  | $ | 10,027 |  |  | $ | 7,152 |
Change in fair value recognized in net (loss) income |  |  | (5,695 | ) |  |  | 1,226 |
Payment of contingent consideration earned |  |  | (817 | ) |  |  | - |
Ending balance |  | $ | 3,515 |  |  | $ | 8,378 |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + 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 (c) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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