Note 12 - Employee Retirement Plans - Schedule of Components of Net Periodic Pension or Other Post Retirement Benefit Cost (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Service cost	$ 63	$ 77	$ 115
Interest cost	229	266	153
Amortization of net gain	(514)	(539)	(400)
Net postretirement healthcare benefit cost	$ (222)	$ (196)	$ (132)