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Note 12 - Employee Benefit Plans - Components of Net Periodic Pension Cost and Assumed Discount Rate (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Service cost	$ 77	$ 80	$ 232	$ 240
Interest cost	88	101	266	303
Amortization of prior service cost	51	65	151	193
Amortization of losses	46	5	139	16
Net periodic cost	$ 262	$ 251	$ 788	$ 752

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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