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Note 4 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Deferred compensation plan	$ 4,085	$ 4,321
Foreign currency forward contracts	4	17
Total financial assets	4,089	4,338
Foreign currency forward contracts	(814)	(661)
Fair Value, Inputs, Level 1 [Member]
Deferred compensation plan	3,567	3,830
Foreign currency forward contracts	0	0
Total financial assets	3,567	3,830
Foreign currency forward contracts	0	0
Fair Value, Inputs, Level 2 [Member]
Deferred compensation plan	518	491
Foreign currency forward contracts	4	17
Total financial assets	522	508
Foreign currency forward contracts	(814)	(661)
Fair Value, Inputs, Level 3 [Member]
Deferred compensation plan	0	0
Foreign currency forward contracts	0	0
Total financial assets	0	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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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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