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Note 10 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred compensation plan	$ 5,150	$ 4,719
Foreign currency forward contracts	(138)
Foreign currency forward contracts		101
Total financial assets		4,820
Fair Value, Inputs, Level 1 [Member]
Deferred compensation plan	4,268	3,925
Foreign currency forward contracts
Foreign currency forward contracts
Total financial assets		3,925
Fair Value, Inputs, Level 2 [Member]
Deferred compensation plan	882	794
Foreign currency forward contracts	(138)
Foreign currency forward contracts		101
Total financial assets		895
Fair Value, Inputs, Level 3 [Member]
Deferred compensation plan
Foreign currency forward contracts
Foreign currency forward contracts
Total financial assets

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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-Topic 820
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- Definition

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

+ References

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