Note 8 - Employee Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits						Postretirement benefits
	Three months ended						Three months ended
	March 31,						March 31,
	2023			2022			2023			2022
Service cost	$	23		$	32		$	1		$	2
Interest cost		45			27			6			4
Expected return on plan assets		(46	)		(55	)
Amortization of actuarial net gain								(5	)
Amortization of prior service cost (credit)		2			1			(1	)		(1	)
Total pension and postretirement benefit expense	$	24		$	5		$	1		$	5