Note 6 - Defined Benefit Plan (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended June 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

	Six Months Ended June 30,
	2020			2019
Service cost	$	540		$	400
Interest cost		410			442
Expected return on plan assets		(840	)		(730	)
Amortization of prior service cost		(54	)		(54	)
Recognized net actuarial loss		354			316
Net periodic benefit cost	$	410		$	374