Note 19 - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 5,447	$ 3,415	$ 3,349	$ 3,710	$ 4,149	$ 3,424	$ 3,869	$ 5,050	$ 15,921	$ 16,492	$ 12,083
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized loss (gain) on investment equity securities									1,026	(926)	47
Stock-based compensation expense									85	102	112
Accretion of discounts on investment securities									2,222	3,152	2,473
(Decrease ) increase in other liabilities									(550)	703	(1,531)
(Increase) decrease in other assets									(298)	(507)	525
Deferred income tax (benefit) provision									(57)	113	(59)
Net cash provided by operating activities									16,835	30,389	7,601
Investing activities
Purchase of investment equity securities									(1,860)	(4,615)	(7,914)
Purchase of investment securities available-for-sale									(35,001)	(385,926)	(295,734)
Proceeds from sale of investment equity securities									1,594	7,768	4,767
Proceeds from maturities of investment securities available-for-sale									72,965	113,911	207,245
Net cash used in investing activities									(71,646)	(282,490)	(185,133)
Financing activities
Cash dividend paid									(4,498)	(4,375)	(4,226)
Treasury stock purchase									(75)	(1,356)	(130)
Proceeds from issuance of common stock									418	575	497
Net cash provided by financing activities									57,320	226,160	199,255
Increase (decrease) in cash and cash equivalents									2,509	(25,941)	21,723
Cash and cash equivalents at beginning of year				13,390				39,331	13,390	39,331	17,608
Cash and cash equivalents at end of period	15,899				13,390				15,899	13,390	39,331
Parent Company [Member]
Operating Activities
Net income									15,921	16,492	12,083
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed income from subsidiary									(12,116)	(8,874)	(7,340)
Net securities gains									(405)	(1,788)	(585)
Net unrealized loss (gain) on investment equity securities									1,026	(926)	47
Stock-based compensation expense									85	102	112
Accretion of discounts on investment securities									(6)
(Decrease ) increase in other liabilities									(266)	222	(682)
(Increase) decrease in other assets									(121)	2	17
Deferred income tax (benefit) provision									(285)	265	(20)
Net cash provided by operating activities									3,833	5,495	3,632
Investing activities
Purchase of investment equity securities									(1,860)	(4,615)	(7,914)
Purchase of investment securities available-for-sale									(1,193)
Proceeds from sale of investment equity securities									1,594	7,768	4,767
Proceeds from maturities of investment securities available-for-sale									900
Capital contribution to Bank										(2,500)
Net cash used in investing activities									(559)	653	(3,147)
Financing activities
Cash dividend paid									(4,498)	(4,375)	(4,226)
Treasury stock purchase									(75)	(1,356)	(130)
Proceeds from issuance of common stock									418	575	497
Net cash provided by financing activities									(4,155)	(5,156)	(3,859)
Increase (decrease) in cash and cash equivalents									(881)	992	(3,374)
Cash and cash equivalents at beginning of year				$ 1,234				$ 242	1,234	242	3,616
Cash and cash equivalents at end of period	$ 353				$ 1,234				$ 353	$ 1,234	$ 242