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Note 3 - Securities - Fair Value of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized cost	$ 136,590	$ 85,585
Gross unrealized gains	103	185
Gross unrealized losses	(4,059)	(76)
Fair value	132,634	85,694
Certificates of Deposit [Member]
Amortized cost	1,240	2,728
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	1,240	2,728
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	400
Gross unrealized gains	0
Gross unrealized losses	(10)
Fair value	390
US Treasury Securities [Member]
Amortized cost	129,039	76,621
Gross unrealized gains	1	8
Gross unrealized losses	(4,035)	(76)
Fair value	125,005	76,553
Residential Mortgage-Backed Securities [Member]
Amortized cost	4,448	4,660
Gross unrealized gains	101	173
Gross unrealized losses	(11)	0
Fair value	4,538	4,833
Collateralized Mortgage-Backed Securities [Member]
Amortized cost	1,463	1,576
Gross unrealized gains	1	4
Gross unrealized losses	(3)	0
Fair value	$ 1,461	$ 1,580

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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