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Note 7 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deferred compensation plan	$ 4,801	$ 5,150
Foreign currency forward contracts	2
Total financial assets	4,803
Foreign currency forward contracts	(529)	(138)
Fair Value, Inputs, Level 1 [Member]
Deferred compensation plan	3,932	4,268
Foreign currency forward contracts	0
Total financial assets	3,932
Foreign currency forward contracts	0	0
Fair Value, Inputs, Level 2 [Member]
Deferred compensation plan	869	882
Foreign currency forward contracts	2
Total financial assets	871
Foreign currency forward contracts	(529)	(138)
Fair Value, Inputs, Level 3 [Member]
Deferred compensation plan	0	0
Foreign currency forward contracts	0
Total financial assets	0
Foreign currency forward contracts	$ 0	$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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

- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

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-Topic 210
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