Note 8 - Employee Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits												Postretirement benefits
	Three months ended						Nine months ended						Three months ended						Nine months ended
	September 30,						September 30,						September 30,						September 30,
	2023			2022			2023			2022			2023			2022			2023			2022
Service cost	$	25		$	32		$	75		$	96		$	1		$	3		$	4		$	7
Interest cost		45			28			133			82			6			3			17			11
Expected return on plan assets		(46	)		(55	)		(138	)		(164	)
Amortization of actuarial net gain														(6	)					(17	)
Amortization of prior service cost (credit)		2			1			5			4			(2	)		(2	)		(4	)		(4	)
Recognition of actuarial loss (gain)		12						(16	)		22						(2	)					(3	)
Special termination benefit charge								5
Total pension and postretirement benefit expense (income)	$	38		$	6		$	64		$	40		$	(1	)	$	2		$	—		$	11