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Note 3 - Securities (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021
U.S. Treasury Notes		$	76,621			$	8			$	(76	)		$	76,553
Certificates of deposit			2,728				—				—				2,728
Mortgage-backed securities - residential			4,660				173				—				4,833
Collateralized mortgage obligations - residential			1,576				4				—				1,580
		$	85,585			$	185			$	(76	)		$	85,694
December 31, 2020
Certificates of deposit		$	15,117			$	—			$	—			$	15,117
Municipal securities			402				7				—				409
Mortgage-backed securities - residential			5,826				282				—				6,108
Collateralized mortgage obligations - residential			2,193				3				(1	)			2,195
		$	23,538			$	292			$	(1	)		$	23,829

Investments Classified by Contractual Maturity Date [Table Text Block]

		December 31, 2021
		Amortized Cost				Fair Value
Due in one year or less		$	2,728			$	2,728
Due after one year through five years			76,621				76,553
			79,349				79,281
Mortgage-backed securities - residential			4,660				4,833
Collateralized mortgage obligations - residential			1,576				1,580
		$	85,585			$	85,694

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, 2021
U.S. Treasury Notes			53			$	62,246			$	(76	)			—			$	—			$	—				53			$	62,246			$	(76	)
December 31, 2020
Collateralized mortgage obligations - residential			—			$	—			$	—				3			$	1,588			$	(1	)			3			$	1,588			$	(1	)

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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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