Note 2 - Investments, Available for Sale (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

	December 31, 2023
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair value
Student Loan Pools	$	51,022	$	72	$	(728	)	$	50,366
Small Business Administration (“SBA”) Bonds		79,014		416		(2,677	)		76,753
Tax Exempt Municipal Bonds		21,501		643		(908	)		21,236
Taxable Municipal Bonds		64,669		—		(11,554	)		53,115
Mortgage-Backed Securities ("MBS")		368,081		31		(31,942	)		336,170
Total AFS Securities	$	584,287	$	1,162	$	(47,809	)	$	537,640

	December 31, 2022
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair value
Student Loan Pools	$	60,855	$	12	$	(1,709	)	$	59,158
SBA Bonds		102,293		584		(3,247	)		99,630
Tax Exempt Municipal Bonds		22,537		405		(1,632	)		21,310
Taxable Municipal Bonds		65,250		—		(14,480	)		50,770
MBS		353,222		30		(33,972	)		319,280
Total AFS Securities	$	604,157	$	1,031	$	(55,040	)	$	550,148

Investments Classified by Contractual Maturity Date [Table Text Block]

(Dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	5	$	5
Due after one year to five years		7,646		7,664
Due after five to ten years		73,665		69,452
Due after ten years or more		134,890		124,349
MBS		368,081		336,170
Total AFS Securities	$	584,287	$	537,640

Debt Securities, Available-for-Sale, 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
Student Loan Pools	$	377	$	1		1	$	43,872	$	727		34	$	44,249	$	728
SBA Bonds		2,200		5		4		39,151		2,672		63		41,351		2,677
Tax Exempt Municipal Bonds		—		—		—		12,965		908		12		12,965		908
Taxable Municipal Bonds		—		—		—		53,115		11,554		59		53,115		11,554
MBS		36,069		434		30		292,864		31,508		213		328,933		31,942
	$	38,646	$	440		35	$	441,967	$	47,369		381	$	480,613	$	47,809

	December 31, 2022
	Less than 12 Months						12 Months or More						Total
	Fair		Unrealized				Fair		Unrealized				Fair		Unrealized
(Dollars in thousands)	Value		Losses		#		Value		Losses		#		Value		Losses
Student Loan Pools	$	24,768	$	638		16	$	30,684	$	1,071		23	$	55,452	$	1,709
SBA Bonds		8,404		121		18		45,969		3,126		52		54,373		3,247
Tax Exempt Municipal Bonds		8,051		719		9		4,929		913		4		12,980		1,632
Taxable Municipal Bonds		14,428		3,197		17		36,342		11,283		43		50,770		14,480
MBS		146,016		11,133		145		170,578		22,839		89		316,594		33,972
	$	201,667	$	15,808		205	$	288,502	$	39,232		211	$	490,169	$	55,040