Note 8 - Accrued Retirement Benefits - Net Periodic Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pensions and other benefits:
Interest cost	$ 105	$ 184
Expected return on plan assets	(72)	(174)
Amortization of net loss	79	68
Settlement expense	6,807	0
Pension and other postretirement expenses	$ 6,919	$ 78