Note 8 - Employee Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits						Postretirement benefits
	Three months ended						Three months ended
	March 31,						March 31,
	2022			2021			2022			2021
Service cost	$	32		$	32		$	2		$	2
Interest cost		27			22			4			4
Expected return on plan assets		(55	)		(54	)
Amortization of prior service cost (credit)		1			1			(1	)		(1	)
Total pension and postretirement benefit expense	$	5		$	1		$	5		$	5