Note 3 - Securities (Tables)

3 Months Ended

Mar. 31, 2022

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
March 31, 2022
Certificates of deposit	$	1,240	$	—	$	—		$	1,240
Municipal securities		400		—		(10	)		390
U.S. Treasury Notes		129,039		1		(4,035	)		125,005
Mortgage-backed securities - residential		4,448		101		(11	)		4,538
Collateralized mortgage obligations - residential		1,463		1		(3	)		1,461
	$	136,590	$	103	$	(4,059	)	$	132,634
December 31, 2021
Certificates of deposit	$	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]

	March 31, 2022
	Amortized Cost		Fair Value
Due in one year or less	$	1,400	$	1,399
Due after one year through five years		129,279		125,236
		130,679		126,635
Mortgage-backed securities - residential		4,448		4,538
Collateralized mortgage obligations - residential		1,463		1,461
	$	136,590	$	132,634

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
March 31, 2022
Municipal securities		2	$	390	$	(10	)		—	$	—	$	—		2	$	390	$	(10	)
U.S. Treasury Notes		184		123,053		(4,035	)		—		—		—		184		123,053		(4,035	)
Mortgage-backed securities - residential		4		679		(11	)		—		—		—		4		679		(11	)
Collateralized mortgage obligations - residential		3		916		(3	)		—		—		—		3		916		(3	)
		193	$	125,038	$	(4,059	)		—	$	—	$	—		193	$	125,038	$	(4,059	)
December 31, 2021
U.S. Treasury Notes		53	$	62,246	$	(76	)		—	$	—	$	—		53	$	62,246	$	(76	)