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Note 7 - Investment and Equity Securities - Amortized Cost and Fair Values of Securities Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized cost	$ 183,665	$ 165,817
Gross unrealized gains	1,111	4,922
Gross unrealized losses	(9,560)	(540)
Investment securities available for sale, at fair value	175,216	170,199
Subordinated Debt Securities [Member]
Amortized cost	32,300	32,300
Gross unrealized gains	275	356
Gross unrealized losses	(593)	(119)
Investment securities available for sale, at fair value	31,982	32,537
Taxable Municipal Bonds [Member]
Amortized cost	500	500
Gross unrealized gains	1	2
Gross unrealized losses	0	0
Investment securities available for sale, at fair value	501	502
Nontaxable Municipal Bonds [Member]
Amortized cost	141,361	122,877
Gross unrealized gains	798	4,307
Gross unrealized losses	(8,662)	(341)
Investment securities available for sale, at fair value	133,497	126,843
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Amortized cost	9,504	10,140
Gross unrealized gains	37	257
Gross unrealized losses	(305)	(80)
Investment securities available for sale, at fair value	$ 9,236	$ 10,317

X

- Definition

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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