Note 3 - Investments, Held to Maturity (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Debt Securities, Held-to-Maturity [Table Text Block]

	December 31, 2023
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
US Treasury Bonds	$	23,874	$	—	$	(278	)	$	23,596
FHLB Bond		1,000		—		—			1,000
Student Loan Pools		16,881		278		—			17,159
SBA Bonds		11,305		493		—			11,798
Taxable Municipal Bonds		962		—		(28	)		934
MBS		109,050		96		(5,093	)		104,053
Total HTM Securities	$	163,072	$	867	$	(5,399	)	$	158,540

	December 31, 2022
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
US Treasury Bonds	$	34,512	$	—	$	(682	)	$	33,830
FHLB Bond		1,000		—		(1	)		999
Student Loan Pools		16,388		88		(59	)		16,417
SBA Bonds		3,521		162		—			3,683
Taxable Municipal Bonds		952		—		(60	)		892
MBS		111,065		29		(5,451	)		105,643
Total HTM Securities	$	167,438	$	279	$	(6,253	)	$	161,464

Held to Maturity Investments, Maturity Dates and Yields [Table Text Block]

	Carrying Value		Average Book Yield
HTM Securities:
Due in one year or less	$	11,978		2.94	%
Due after one year through five years		13,858		3.60	%
Due after five years through ten years		6,914		6.90	%
Due after ten years		21,272		7.07	%
MBS		109,050		4.66	%
Total HTM Securities	$	163,072		4.85	%

Debt Securities, Held to Maturity, Unrealized Loss Position, Fair Value [Table Text Block]

	December 31, 2023
	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(Dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
US Treasury Bonds	$	—	$	—	$	23,596	$	278	$	23,596	$	278
Taxable Municipal Bonds		—		—		934		28		934		28
MBS		40,732		458		58,731		4,635		99,463		5,093
	$	40,732	$	458	$	83,261	$	4,941	$	123,993	$	5,399

	December 31, 2022
	Less than 12 Months				12 Months or More				Total
(Dollars in thousands)	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
US Treasury Bonds	$	33,830	$	682	$	—	$	—	$	33,830	$	682
FHLB Bond		999		1		—		—		999		1
Student Loan Pools		6,520		59		—		—		6,520		59
Taxable Municipal Bonds		892		60		—		—		892		60
MBS		88,351		3,145		9,334		2,306		97,685		5,451
	$	130,592	$	3,947	$	9,334	$	2,306	$	139,926	$	6,253

Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block]

(Dollars in thousands)	Amortized Cost
Taxable Municipal Bond
AA		962
Total Taxable Municipal Bond		962
Private Label MBS
AAA		9,259
A		1,663
Not Rated		3,695
Total Private Label		14,617