Note 14 - Retirement Fund and Profit Sharing Plan - Components of SERP Expense (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Service Cost	$ 677	$ 600
Interest Cost	540	636
Net amortization	509	343
Net periodic benefit cost	$ 1,726	$ 1,579