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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
	Mar. 31, 2022	Mar. 31, 2021
Contingent Payments [Member]
Balance at beginning of reporting period, liability	$ (62)	$ (924)
Included in interest income (expense), liability	0	(13)
Included in other comprehensive income (loss), liability	0	0
Included in other items, net, liability	0	26
Settlements, liability	62	142
Balance at end of reporting period, liability	0	(769)
Investment, Available-For-Sale [Member]
Balance at beginning of reporting period, asset	15,822	16,692
Included in interest income (expense), asset	42	41
Included in other comprehensive income (loss), asset	(252)	(436)
Included in other items, net, asset	0	0
Settlements, asset	0	0
Balance at end of reporting period, asset	$ 15,612	$ 16,297

X

- 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.

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Amount of gain (loss) recognized in other items, net from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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- Definition

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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

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

+ References

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-Publisher FASB
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