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Note 15 - Employee Benefit Plans - Summary of Fair Values of Pension Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair value of plan assets	$ 32,353	$ 31,738	$ 30,199
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	15,658	12,750
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets	2,744	2,228
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Fair value of plan assets	2,272	1,935
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member]
Fair value of plan assets	867	1,067
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member]
Fair value of plan assets	224	609
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
Fair value of plan assets	2,256	2,214
Fair Value, Inputs, Level 1 [Member] | Real Estate [Member]
Fair value of plan assets	391	546
Fair Value, Inputs, Level 1 [Member] | Other Equity Securities [Member]
Fair value of plan assets	600	757
Fair Value, Inputs, Level 1 [Member] | Fixed Income Securities [Member]
Fair value of plan assets	6,304	3,394
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	16,695	18,988
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Real Estate [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Other Equity Securities [Member]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Fixed Income Securities [Member]
Fair value of plan assets	$ 16,695	$ 18,988

X

- 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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