Note 6 - Defined Benefit Plan (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended September 30,
	2020			2019
Service cost	$	270		$	200
Interest cost		205			221
Expected return on plan assets		(420	)		(365	)
Amortization of prior service cost		(27	)		(27	)
Recognized net actuarial loss		177			158
Net periodic benefit cost	$	205		$	187

	Nine Months Ended September 30,
	2020			2019
Service cost	$	810		$	600
Interest cost		615			663
Expected return on plan assets		(1,260	)		(1,095	)
Amortization of prior service cost		(81	)		(81	)
Recognized net actuarial loss		531			474
Net periodic benefit cost	$	615		$	561