Note 4 - Premises and Equipment, Net (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Depreciation	$ 1,500,000	$ 1,500,000	$ 4,400,000	$ 4,500,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	2 years 2 months 12 days		2 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	5.90%		5.90%
Operating Lease, Expense	$ 400,000	$ 200,000	$ 1,300,000	$ 600,000
Premises and Equipment, Net [Member]
Operating Lease, Right-of-Use Asset	4,000,000		4,000,000		$ 3,500,000
Other Liabilities [Member]
Operating Lease, Liability	$ 3,999,000		$ 3,999,000		$ 3,500,000
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)	3 years		3 years
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years		5 years