Note 19 - Condensed Statement of Cash Flows (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net income	$ 1,134,000	$ 2,344,000	$ 1,887,000	$ 4,118,000	$ 5,447,000	$ 3,415,000	$ 3,349,000	$ 3,710,000	$ 9,483,000	$ 15,921,000	$ 16,492,000
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized (gain) loss on equity securities									(250,000)	1,026,000	(926,000)
Stock-based compensation expense									185,000	85,000	102,000
Accretion of discounts on investment securities									1,665,000	2,222,000	3,152,000
(Decrease ) increase in other liabilities									287,000	(550,000)	703,000
(Increase) decrease in other assets									(91,000)	(298,000)	(507,000)
Deferred income tax (benefit) provision									52,000	(57,000)	113,000
Net cash provided by operating activities									14,457,000	16,835,000	30,389,000
Investing activities
Purchase of investment equity securities									(2,179,000)	(1,860,000)	(4,615,000)
Purchase of investment securities available-for-sale									(14,381,000)	(35,001,000)	(385,926,000)
Proceeds from sale of investment equity securities									8,556,000	1,594,000	7,768,000
Proceeds from maturities of investment securities available-for-sale									50,042,000	72,965,000	113,911,000
Net cash provided (used) in investing activities									23,039,000	(71,646,000)	(282,490,000)
Financing activities
Cash dividend paid									(4,671,000)	(4,498,000)	(4,375,000)
Treasury stock purchase										(75,000)	(1,356,000)
Proceeds from issuance of common stock									822,000	418,000	575,000
Net cash provided by financing activities									9,262,000	57,320,000	226,160,000
Increase (decrease) in cash and cash equivalents									46,758,000	2,509,000	(25,941,000)
Cash and cash equivalents at beginning of year				15,899,000				13,390,000	15,899,000	13,390,000	39,331,000
Cash and cash equivalents at end of period	62,657,000				15,899,000				62,657,000	15,899,000	13,390,000
Parent Company [Member]
Operating Activities
Net income									9,483,000	15,921,000	16,492,000
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed income from subsidiary									(4,988,000)	(12,116,000)	(8,874,000)
Net securities losses (gains)									19,000	(405,000)	(1,788,000)
Net unrealized (gain) loss on equity securities									(250,000)	1,026,000	(926,000)
Stock-based compensation expense									185,000	85,000	102,000
Accretion of discounts on investment securities									(174,000)	(6,000)
(Decrease ) increase in other liabilities									(36,000)	(266,000)	222,000
(Increase) decrease in other assets									(122,000)	(121,000)	2,000
Deferred income tax (benefit) provision									42,000	(285,000)	265,000
Net cash provided by operating activities									4,159,000	3,833,000	5,495,000
Investing activities
Purchase of investment equity securities									(2,179,000)	(1,860,000)	(4,615,000)
Purchase of investment securities available-for-sale									(14,275,000)	(1,193,000)
Proceeds from sale of investment equity securities									8,556,000	1,594,000	7,768,000
Proceeds from maturities of investment securities available-for-sale									7,800,000	900,000
Capital contribution to Bank											(2,500,000)
Net cash provided (used) in investing activities									(98,000)	(559,000)	653,000
Financing activities
Cash dividend paid									(4,671,000)	(4,498,000)	(4,375,000)
Treasury stock purchase										(75,000)	(1,356,000)
Proceeds from issuance of common stock									822,000	418,000	575,000
Net cash provided by financing activities									(3,849,000)	(4,155,000)	(5,156,000)
Increase (decrease) in cash and cash equivalents									212,000	(881,000)	992,000
Cash and cash equivalents at beginning of year				$ 353,000				$ 1,234,000	353,000	1,234,000	242,000
Cash and cash equivalents at end of period	$ 565,000				$ 353,000				$ 565,000	$ 353,000	$ 1,234,000