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Note 3 - Securities (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Available-for-Sale Securities
June 30, 2023
Certificates of deposit		$	2,977			$	—			$	—			$	2,977
Municipal securities			240				—				(14	)			226
U.S. Treasury Notes			128,231				—				(6,204	)			122,027
U.S. government-sponsored agencies			40,000				—				(273	)			39,727
Mortgage-backed securities - residential			3,730				20				(153	)			3,597
Collateralized mortgage obligations - residential			1,115				—				(22	)			1,093
		$	176,293			$	20			$	(6,666	)		$	169,647
December 31, 2022
Certificates of deposit		$	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

Investments Classified by Contractual Maturity Date [Table Text Block]

		June 30, 2023
		Amortized Cost				Fair Value
Due in one year or less		$	86,502			$	84,770
Due after one year through five years			84,946				80,187
			171,448				164,957
Mortgage-backed securities - residential			3,730				3,597
Collateralized mortgage obligations - residential			1,115				1,093
		$	176,293			$	169,647

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
June 30, 2023
Municipal securities			—			$	—			$	—				1			$	226			$	(14	)			1			$	226			$	(14	)
U.S. Treasury Notes			1				3,652				(103	)			180				118,375				(6,101	)			181				122,027				(6,204	)
U.S. government-sponsored agencies			9				39,727				(273	)			—				—				—				9				39,727				(273	)
Mortgage-backed securities - residential			8				752				(20	)			10				2,118				(133	)			18				2,870				(153	)
Collateralized mortgage obligations - residential			—				—				—				7				1,093				(22	)			7				1,093				(22	)
			18			$	44,131			$	(396	)			198			$	121,812			$	(6,270	)			216			$	165,943			$	(6,666	)
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	)

Gain (Loss) on Securities [Table Text Block]

		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2023				2022				2023				2022
Proceeds		$	—			$	—			$	42,631			$	—
Gross gains			—				—				—				—
Gross losses			—				—				(454	)			—

X

- Definition

Tabular disclosure of realized and unrealized gain (loss) on investment in security.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
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-SubTopic 10
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