Note 9 - Employee Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2024

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,
	2024			2023			2024			2023			2024			2023			2024			2023
Service cost	$	25		$	25		$	73		$	75					$	1		$	2		$	4
Interest cost		46			45			138			133		$	4			6			14			17
Expected return on plan assets		(48	)		(46	)		(144	)		(138	)
Amortization of actuarial net gain														(6	)		(6	)		(18	)		(17	)
Amortization of prior service cost (credit)		1			2			4			5			(1	)		(2	)		(5	)		(4	)
Recognition of actuarial (gain) loss		(31	)		12			(31	)		(16	)
Special termination benefit charge		3						6			5
Total pension and postretirement benefit (income) expense	$	(4	)	$	38		$	46		$	64		$	(3	)	$	(1	)	$	(7	)	$	—