Note 7 - Investments, Held to Maturity ("HTM") (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

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

	September 30, 2023
	Amortized		Gross Unrealized		Gross Unrealized			Fair
	Cost		Gains		Losses			Value
US Treasury Bonds	$	34,782,248	$	—	$	(587,405	)	$	34,194,843
FHLB Bond		1,000,000		—		(13,279	)		986,721
Student Loan Pools		17,510,213		272,590		—			17,782,803
SBA Bonds		12,689,280		583,741		—			13,273,021
Taxable Municipal Bonds		959,701		—		(53,531	)		906,170
MBS		107,194,773		—		(7,699,635	)		99,495,138
Total Investments HTM	$	174,136,215	$	856,331	$	(8,353,850	)	$	166,638,696

	December 31, 2022
	Amortized		Gross Unrealized		Gross Unrealized			Fair
	Cost		Gains		Losses			Value
US Treasury Bonds	$	34,511,849	$	—	$	(682,198	)	$	33,829,651
FHLB Bond		1,000,000		—		(1,360	)		998,640
Student Loan Pools		16,387,997		88,489		(59,090	)		16,417,396
SBA Bonds		3,521,293		162,235		—			3,683,528
Taxable Municipal Bonds		951,864		—		(60,134	)		891,730
MBS		111,064,613		29,194		(5,451,179	)		105,642,628
Total Investments HTM	$	167,437,616	$	279,918	$	(6,253,961	)	$	161,463,573

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

	September 30, 2023
	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
US Treasury Bonds	$	—	$	—		$	34,194,843	$	(587,405	)	$	34,194,843	$	(587,405	)
FHLB Bond		986,721		(13,279	)		—		—			986,721		(13,279	)
Taxable Municipal Bonds		—		—			906,170		(53,531	)		906,170		(53,531	)
MBS		52,315,812		(1,243,762	)		47,179,326		(6,455,873	)		99,495,138		(7,699,635	)
	$	53,302,533	$	(1,257,041	)	$	82,280,339	$	(7,096,809	)	$	135,582,872	$	(8,353,850	)

	December 31, 2022
	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
US Treasury Bonds	$	33,829,651	$	(682,198	)	$	—	$	—		$	33,829,651	$	(682,198	)
FHLB Bond		998,640		(1,360	)		—		—			998,640		(1,360	)
Student Loan Pools		6,520,050		(59,090	)		—		—			6,520,050		(59,090	)
Taxable Municipal Bonds		891,730		(60,134	)		—		—			891,730		(60,134	)
MBS		88,351,096		(3,145,166	)		9,334,438		(2,306,013	)		97,685,534		(5,451,179	)
	$	130,591,167	$	(3,947,948	)	$	9,334,438	$	(2,306,013	)	$	139,925,605	$	(6,253,961	)