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Note 12 - Fair Value Measurements - Changes in Fair Value of Level 3 Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contingent Payments [Member]
Balance at beginning of reporting period, liability	$ (1,712)	$ (2,407)
Included in interest income (expense), liability	(82)	(140)
Included in other comprehensive income (loss), liability	0	0
Included in other items, net, liability	192	(42)
Settlements, liability	678	877
Balance at end of reporting period, liability	(924)	(1,712)
Investment, Available-For-Sale [Member]
Balance at beginning of reporting period, asset	16,151	15,772
Included in interest income (expense), asset	156	150
Included in other comprehensive income (loss), asset	935	739
Included in other items, net, asset	0	0
Settlements, asset	(550)	(510)
Balance at end of reporting period, asset	$ 16,692	$ 16,151

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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

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+ References

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-Publisher FASB
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-SubTopic 10
-Section 50
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+ References

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-Publisher FASB
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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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