Note 4 - Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Total, at cost	$ 13,260	$ 12,092
Less accumulated depreciation and amortization	(5,012)	(4,348)
Premises and equipment, net	8,248	7,744
Land [Member]
Total, at cost	1,704	1,704
Building [Member]
Total, at cost	5,036	4,960
Leasehold Improvements [Member]
Total, at cost	1,503	421
Furniture and Fixtures [Member]
Total, at cost	1,911	1,505
Computer and Software [Member]
Total, at cost	3,106	2,669
Construction in Progress [Member]
Total, at cost		$ 833