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Note 15 - Pension Plan - Assets Measured at Fair Value (Details) - Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair value of plan assets	$ 37,177	$ 38,813	$ 33,016
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	36,260
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets
Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	918
Equity Funds [Member]
Fair value of plan assets	3,146
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	3,146
US Government Agencies Debt Securities [Member]
Fair value of plan assets	33,022
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	33,022
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets
Cash [Member]
Fair value of plan assets	92
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	92
Other Plan Assets[Member]
Fair value of plan assets	918
Other Plan Assets[Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	$ 918

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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