Note 19 - Condensed Balance Sheet (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 62,657,000	$ 15,899,000
Investment securities:
Available-for-sale (amortized cost $6,448 and $299)	490,182,000	546,525,000
Equity securities (cost of $5,695 and $12,091)	5,910,000	12,056,000
Other assets	7,320,000	4,767,000
Total assets	1,706,318,000	1,668,497,000
Liabilities
Other liabilities	7,393,000	7,376,000
Shareholders' equity	90,824,000	70,958,000	$ 136,494,000	$ 134,445,000
Total liabilities and shareholders' equity	1,706,318,000	1,668,497,000
Parent Company [Member]
Assets
Cash and cash equivalents	565,000	353,000
Investment securities:
Available-for-sale (amortized cost $6,448 and $299)	6,451,000	301,000
Equity securities (cost of $5,695 and $12,091)	5,910,000	12,056,000
Investment in subsidiary	77,173,000	58,140,000
Other assets	752,000	146,000
Total assets	90,851,000	70,996,000
Liabilities
Other liabilities	27,000	38,000
Shareholders' equity	90,824,000	70,958,000
Total liabilities and shareholders' equity	$ 90,851,000	$ 70,996,000