Note 12 - Condensed Financial Statements of Parent Company - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities
Net income	$ 20,382	$ 16,077
Adjustment to reconcile net income to net cash provided by operating activities:
Other assets	1,661	(132)
Net change in other liabilities	(515)	203
Net cash provided by operating activities	22,882	13,793
Cash Flows from Investing Activities
Net change in interest-bearing deposits	(9,296)	(43,844)
Net cash used in investing activities	(202,545)	(177,604)
Cash Flows from Financing Activities
Cash dividends paid	(8,806)	(9,000)
Shares repurchased	(13,354)	(1,722)
Net cash provided by financing activities	175,284	166,668
Parent Company [Member]
Cash Flows from Operating Activities
Net income	20,382	16,077
Adjustment to reconcile net income to net cash provided by operating activities:
Deficit (equity) in undistributed net income of subsidiaries	6,715	(5,049)
Net change in refundable income taxes due from subsidiaries	(201)	(23)
Other assets	221	(45)
Net change in other liabilities	(217)	(2)
Net cash provided by operating activities	13,470	21,056
Cash Flows from Investing Activities
Net change in interest-bearing deposits	10,027	(9,404)
Net cash used in investing activities	10,027	(9,404)
Cash Flows from Financing Activities
Cash dividends paid	(8,806)	(9,000)
Shares repurchased	(13,354)	(1,722)
Net cash provided by financing activities	(22,160)	(10,722)
Net change in cash	1,337	930
Cash due from subsidiaries at beginning of year	987	57
Cash due from subsidiaries at end of year	$ 2,324	$ 987