Note 6 - Defined Benefit Plan (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Benefits
	Six Months Ended June 30,
	2019			2018
Service cost	$	400		$	434
Interest cost		442			400
Expected return on plan assets		(730	)		(800	)
Amortization of prior service cost		(54	)		(54	)
Recognized net actuarial loss		316			292
Net periodic benefit cost	$	374		$	272