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Note 10 - 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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Contingent Payments [Member]
Balance at beginning of reporting period, liability	$ (2,072)	$ (2,577)	$ (2,407)	$ (2,887)
Included in interest income (expense), liability	(33)	(67)	(109)	(186)
Included in other comprehensive income (loss), liability	0	0	0	0
Included in other items, net, liability	40	(114)	(21)	(132)
Settlements, liability	207	201	679	648
Balance at end of reporting period, liability	(1,858)	(2,557)	(1,858)	(2,557)
Investment, Available-For-Sale [Member]
Balance at beginning of reporting period, asset	15,963	15,591	15,772	17,752
Included in interest income (expense), asset	37	35	112	107
Included in other comprehensive income (loss), asset	751	191	1,377	(1,567)
Included in other items, net, asset	0	0	0	0
Settlements, asset	0	0	(510)	(475)
Balance at end of reporting period, asset	$ 16,751	$ 15,817	$ 16,751	$ 15,817

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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- 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
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-SubTopic 10
-Section 50
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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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