Note 8 - Employee Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits												Postretirement benefits
	Three months ended						Six months ended						Three months ended						Six months ended
	June 30,						June 30,						June 30,						June 30,
	2023			2022			2023			2022			2023			2022			2023			2022
Service cost	$	27		$	32		$	50		$	64		$	2		$	2		$	3		$	4
Interest cost		43			27			88			54			5			4			11			8
Expected return on plan assets		(46	)		(54	)		(92	)		(109	)
Amortization of actuarial net gain														(6	)					(11	)
Amortization of prior service cost (credit)		1			2			3			3			(1	)		(1	)		(2	)		(2	)
Recognition of actuarial loss (gain)					22						22						(1	)					(1	)
Special termination benefit charge		5						5
Total pension and postretirement benefit expense	$	30		$	29		$	54		$	34		$	—		$	4		$	1		$	9