Note 4 - Premises and Equipment, Net (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Depreciation	$ 1,500,000	$ 1,600,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	2 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	5.79%
Operating Lease, Expense	$ 300,000		$ 1,300,000
Premises and Equipment, Net [Member]
Operating Lease, Right-of-Use Asset	3,900,000		3,500,000
Other Liabilities [Member]
Operating Lease, Liability	$ 3,876,000		$ 3,500,000
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)	3 years
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years