Note 3 - Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Available-for-sale securities, Amortized cost	$ 302,587	$ 185,269
Available-for-sale securities, Gross unrealized gains	6,742	9,317
Available-for-sale securities, Gross unrealized losses	1,687	6
SECURITIES, available-for-sale	307,642	194,580
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, Amortized cost	145,775	93,406
Available-for-sale securities, Gross unrealized gains	5,494	6,400
Available-for-sale securities, Gross unrealized losses	485	1
SECURITIES, available-for-sale	150,784	99,805
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities, Amortized cost	152,507	90,712
Available-for-sale securities, Gross unrealized gains	1,248	2,904
Available-for-sale securities, Gross unrealized losses	1,185	5
SECURITIES, available-for-sale	152,570	93,611
Other Debt Obligations [Member]
Available-for-sale securities, Amortized cost	1,805	1,151
Available-for-sale securities, Gross unrealized gains	0	13
Available-for-sale securities, Gross unrealized losses	0	0
SECURITIES, available-for-sale	1,805	$ 1,164
US Government Corporations and Agencies Securities [Member]
Available-for-sale securities, Amortized cost	2,500
Available-for-sale securities, Gross unrealized gains	0
Available-for-sale securities, Gross unrealized losses	17
SECURITIES, available-for-sale	$ 2,483

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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