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Note 3 - Securities (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

Available-for-Sale Securities		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
December 31, 2022
Certificates of deposits		$	2,233			$	—			$	—			$	2,233
Municipal securities			240				—				(15	)			225
U.S. Treasury Notes			170,906				—				(7,803	)			163,103
U.S. government-sponsored agencies			40,000				—				(301	)			39,699
Mortgage-backed securities - residential			3,997				27				(143	)			3,881
Collateralized mortgage obligations - residential			1,223				—				(26	)			1,197
		$	218,599			$	27			$	(8,288	)		$	210,338
December 31, 2021
Certificates of deposits		$	2,728			$	—			$	—			$	2,728
U.S. Treasury Notes			76,621				8				(76	)			76,553
Mortgage-backed securities - residential			4,660				173				—				4,833
Collateralized mortgage obligations - residential			1,576				4				—				1,580
		$	85,585			$	185			$	(76	)		$	85,694

Investments Classified by Contractual Maturity Date [Table Text Block]

		December 31, 2022
		Amortized Cost				Fair Value
Due in one year or less		$	61,336			$	60,324
Due after one year through five years			152,043				144,936
			213,379				205,260
Mortgage-backed securities - residential			3,997				3,881
Collateralized mortgage obligations - residential			1,223				1,197
		$	218,599			$	210,338

Schedule of Unrealized Loss on Investments [Table Text Block]

		Less than 12 Months												12 Months or More												Total
		Count				Fair Value				Unrealized Loss				Count				Fair Value				Unrealized Loss				Count				Fair Value				Unrealized Loss
December 31, 2022
Municipal securities			1			$	225			$	(15	)			—			$	—			$	—				1			$	225			$	(15	)
U.S. Treasury Notes			147				104,439				(4,104	)			53				58,664				(3,699	)			200				163,103				(7,803	)
U.S. government-sponsored agencies			9				39,699				(301	)			—				—				—				9				39,699				(301	)
Mortgage-backed securities - residential			18				3,016				(143	)			—				—				—				18				3,016				(143	)
Collateralized mortgage obligations - residential			5				1,009				(18	)			1				171				(8	)			6				1,180				(26	)
			180			$	148,388			$	(4,581	)			54			$	58,835			$	(3,707	)			234			$	207,223			$	(8,288	)
December 31, 2021
U.S. Treasury Notes			53			$	62,246			$	(76	)			—			$	—			$	—				53			$	62,246			$	(76	)

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
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