Note 23 - Revenue From Contracts With Customers (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Trading Activity Charges Reducing Product Sales Commissions and Fees	$ 663,000	$ 620,000
Contract with Customer, Asset, after Allowance for Credit Loss, Total	0
Contract with Customer, Liability, Total	0
Fiduciary and Trust [Member]
Accrued Fees and Other Revenue Receivable	$ 3,800,000		$ 3,400,000