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Note 3 - Securities - Fair Value of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Amortized cost	$ 18,627	$ 23,538
Gross unrealized gains	256	292
Gross unrealized losses	0	(1)
Fair value	18,883	23,829
Certificates of Deposit [Member]
Amortized cost	10,905	15,117
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	10,905	15,117
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	401	402
Gross unrealized gains	3	7
Gross unrealized losses	0	0
Fair value	404	409
Residential Mortgage Backed Securities [Member]
Amortized cost	5,458	5,826
Gross unrealized gains	248	282
Gross unrealized losses	0	0
Fair value	5,706	6,108
Collateralized Mortgage Backed Securities [Member]
Amortized cost	1,863	2,193
Gross unrealized gains	5	3
Gross unrealized losses	0	(1)
Fair value	$ 1,868	$ 2,195

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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