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Note 8 - Employee Benefit Plans - Fair Value of Plan Assets By Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair value of plan assets	$ 27,252	$ 23,926	$ 21,114
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	1,907	1,860
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	25,345	22,066
Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	$ 0	$ 0

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

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