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Note 3 - Available-for-sale Securities - Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Available-for-sale securities, amortized cost	$ 96,547	$ 49,960
Available-for-sale securities, gross unrealized gains	178	491
Available-for-sale securities, gross unrealized losses	(2,384)	(1,189)
Available-for-sale securities	94,341	49,262
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities, amortized cost	67,850	16,719
Available-for-sale securities, gross unrealized gains	24	131
Available-for-sale securities, gross unrealized losses	(1,245)	(17)
Available-for-sale securities	66,629	16,833
Corporate Debt Securities [Member]
Available-for-sale securities, amortized cost	17,754	18,014
Available-for-sale securities, gross unrealized gains	118	260
Available-for-sale securities, gross unrealized losses	(951)	(984)
Available-for-sale securities	16,921	17,290
Subordinated Notes [Member]
Available-for-sale securities, amortized cost	4,608	9,036
Available-for-sale securities, gross unrealized gains	35	97
Available-for-sale securities, gross unrealized losses	(17)	(128)
Available-for-sale securities	4,626	9,005
SBA Loan Pools [Member]
Available-for-sale securities, amortized cost	5,772	5,627
Available-for-sale securities, gross unrealized gains	0	0
Available-for-sale securities, gross unrealized losses	(169)	(60)
Available-for-sale securities	5,603	5,567
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, amortized cost	563	564
Available-for-sale securities, gross unrealized gains	1	3
Available-for-sale securities, gross unrealized losses	(2)	0
Available-for-sale securities	$ 562	$ 567

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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