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Note 8 - Employee Benefit Plans - Change in Benefit Obligation (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Benefit obligation	$ 22,562	$ 25,519	$ 20,027
Fair value of plan assets	27,252	23,926	$ 21,114
Net funded status	3,799	(1,593)
Pension Plan [Member]
Benefit obligation	22,562	25,519
Fair value of plan assets	27,252	23,926
Net funded status	$ 4,690	$ (1,593)

X

- Definition

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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X

- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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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.

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