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, 2021	Dec. 31, 2020
Company contributions	$ 504	$ 446
Benefits paid	(504)	(446)
Benefit obligation	24,308	21,541
Service Cost	677	600
Interest Cost	540	636
Benefits paid	(504)	(446)
Actuarial (gains) losses	(1,441)	1,977
Benefit obligation	23,580	24,308
Underfunded status, December 31	$ (23,580)	$ (24,308)