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Note 8 - Fair Value Measurements - Changes in Fair Value of Level 3 Assets and Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Contingent Payments [Member] |  |  |  |
Balance at beginning of reporting period, liability | $ (489) | $ (1,275) | $ (924) | $ (1,712)
Included in interest income (expense), liability | (4) | (18) | (26) | (66)
Included in other comprehensive income (loss), liability | 0 | 0 | 0 | 0
Included in other items, net, liability | 18 | (59) | 21 | 162
Settlements, liability | 195 | 206 | 649 | 470
Balance at end of reporting period, liability | (280) | (1,146) | (280) | (1,146)
Investment, Available-For-Sale [Member] |  |  |  |
Balance at beginning of reporting period, asset | 15,696 | 16,867 | 16,692 | 16,151
Included in interest income (expense), asset | 39 | 38 | 121 | 116
Included in other comprehensive income (loss), asset | 328 | 322 | (160) | 1,510
Included in other items, net, asset | 0 | 0 | 0 | 0
Settlements, asset | 0 | 0 | (590) | (550)
Balance at end of reporting period, asset | $ 16,063 | $ 17,227 | $ 16,063 | $ 17,227

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- Definition Amount of gain (loss) recognized in other items, net from asset measured at fair value on recurring basis using unobservable input (level 3). + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in other items, net from liability measured at fair value on recurring basis using unobservable input (level 3). + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (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 (c)(1a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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