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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, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Contingent Payments [Member] |  |  |  |
Balance at beginning of reporting period, liability | $ (1,275) | $ (2,072) | $ (1,712) | $ (2,407)
Included in interest income (expense), liability | (18) | (33) | (66) | (109)
Included in other comprehensive income (loss), liability | 0 | 0 | 0 | 0
Included in other items, net, liability | (59) | 40 | 162 | (21)
Settlements, liability | 206 | 207 | 470 | 679
Balance at end of reporting period, liability | (1,146) | (1,858) | (1,146) | (1,858)
Investment, Available-For-Sale [Member] |  |  |  |
Balance at beginning of reporting period, asset | 16,867 | 15,963 | 16,151 | 15,772
Included in interest income (expense), asset | 38 | 37 | 116 | 112
Included in other comprehensive income (loss), asset | 322 | 751 | 1,510 | 1,377
Included in other items, net, asset | 0 | 0 | 0 | 0
Settlements, asset | 0 | 0 | (550) | (510)
Balance at end of reporting period, asset | $ 17,227 | $ 16,751 | $ 17,227 | $ 16,751

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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=117815213&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=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in income from liability 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=117815213&loc=d3e19207-110258 + Details
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