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Note 3 - Available-for-sale Securities - Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Available-for-sale securities, amortized cost	$ 108,551	$ 49,960
Available-for-sale securities, gross unrealized gains	500	491
Available-for-sale securities, gross unrealized losses	(439)	(1,189)
Available-for-sale securities	108,612	49,262
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities, amortized cost	74,303	16,719
Available-for-sale securities, gross unrealized gains	74	131
Available-for-sale securities, gross unrealized losses	(373)	(17)
Available-for-sale securities	74,004	16,833
Corporate Debt Securities [Member]
Available-for-sale securities, amortized cost	18,253	18,014
Available-for-sale securities, gross unrealized gains	339	260
Available-for-sale securities, gross unrealized losses	0	(984)
Available-for-sale securities	18,592	17,290
Subordinated Notes [Member]
Available-for-sale securities, amortized cost	4,609	9,036
Available-for-sale securities, gross unrealized gains	69	97
Available-for-sale securities, gross unrealized losses	(4)	(128)
Available-for-sale securities	4,674	9,005
SBA Loan Pools [Member]
Available-for-sale securities, amortized cost	10,823	5,627
Available-for-sale securities, gross unrealized gains	17	0
Available-for-sale securities, gross unrealized losses	(61)	(60)
Available-for-sale securities	10,779	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	(1)	0
Available-for-sale securities	$ 563	$ 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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