Note 14 - Retirement Fund and Profit Sharing Plan - Changes in Plan Assets and Benefit Obligation (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Company contributions	$ 606	$ 504
Benefits paid	(606)	(504)
Benefit obligation	23,580	24,308
Service Cost	503	677
Interest Cost	636	540
Benefits paid	(606)	(504)
Actuarial gains	(5,938)	(1,441)
Benefit obligation	18,175	23,580
Underfunded status, December 31	$ (18,175)	$ (23,580)