Note 27 - Revenue From Contracts With Customers (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Trading Activity Charges Reducing Product Sales Commissions and Fees	$ 516,000	$ 544,000
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	$ 2,100,000	$ 1,900,000