Note 6 - Defined Benefit Plan (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Benefits
	Three Months Ended March,
	2019			2018
Service cost	$	200		$	217
Interest cost		221			200
Expected return on plan assets		(365	)		(400	)
Amortization of prior service cost		(27	)		(27	)
Recognized net actuarial loss		158			146
Net periodic benefit cost	$	187		$	136