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Note 3 - Securities - Fair Value of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized cost	$ 218,599	$ 85,585
Gross unrealized gains	27	185
Gross unrealized losses	(8,288)	(76)
Fair value	210,338	85,694
Certificates of Deposit [Member]
Amortized cost	2,233	2,728
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	2,233	2,728
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	240
Gross unrealized gains	0
Gross unrealized losses	(15)
Fair value	225
US Treasury Securities [Member]
Amortized cost	170,906	76,621
Gross unrealized gains	0	8
Gross unrealized losses	(7,803)	(76)
Fair value	163,103	76,553
US Government-sponsored Enterprises Debt Securities [Member]
Amortized cost	40,000
Gross unrealized gains	0
Gross unrealized losses	(301)
Fair value	39,699
Residential Mortgage-Backed Securities [Member]
Amortized cost	3,997	4,660
Gross unrealized gains	27	173
Gross unrealized losses	(143)	0
Fair value	3,881	4,833
Collateralized Mortgage-Backed Securities [Member]
Amortized cost	1,223	1,576
Gross unrealized gains	0	4
Gross unrealized losses	(26)	0
Fair value	$ 1,197	$ 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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