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

6 Months Ended

Jun. 30, 2023

Notes Tables

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

	June 30, 2023
	Amortized		Gross Unrealized		Gross Unrealized		Fair
	Cost		Gains		Losses		Value
US Treasury Bonds	$	34,691,658	$	—	$	709,002	$	33,982,656
FHLB Bond		1,000,000		—		11,448		988,552
Student Loan Pools		17,975,057		69,938		81,883		17,963,112
SBA Bonds		13,148,556		604,114		—		13,752,670
Taxable Municipal Bonds		957,062		—		55,302		901,760
MBS		108,850,325		507		5,850,308		103,000,524
Total Held To Maturity	$	176,622,658	$	674,559	$	6,707,943	$	170,589,274

	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 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]

	June 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	$	33,982,656	$	709,002	$	—	$	—	$	33,982,656	$	709,002
FHLB Bond		988,552		11,448		—		—		988,552		11,448
Student Loan Pools		9,128,369		81,883		—		—		9,128,369		81,883
Taxable Municipal Bonds		901,760		55,302		—		—		901,760		55,302
MBS		74,800,709		2,268,240		28,177,551		3,582,068		102,978,260		5,850,308
	$	119,802,046	$	3,125,875	$	28,177,551	$	3,582,068	$	147,979,597	$	6,707,943

	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