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Investments, Available for Sale (Tables)
 3 Months Ended
Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available for Sale Securities
The amortized cost, gross unrealized gains, gross unrealized losses, and fair values of investments AFS at the dates indicated were as follows:
 March 31, 2023
 Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Student Loan Pools$57,131,715 $6,090 $1,303,979 $55,833,826 
Small Business Administration (“SBA”) Bonds94,018,900 508,204 2,831,043 91,696,061 
Tax Exempt Municipal Bonds21,550,469 593,719 1,224,676 20,919,512 
Taxable Municipal Bonds64,729,848 — 11,794,778 52,935,070 
Mortgage-Backed Securities ("MBS")350,265,323 39,438 30,619,157 319,685,604 
Total Available For Sale$587,696,255 $1,147,451 $47,773,633 $541,070,073 
 December 31, 2022
 Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Student Loan Pools$60,854,658 $11,647 $1,709,323 $59,156,982 
SBA Bonds102,292,600 584,290 3,246,923 99,629,967 
Tax Exempt Municipal Bonds22,536,806 405,341 1,631,819 21,310,328 
Taxable Municipal Bonds65,249,883 — 14,480,144 50,769,739 
MBS353,223,361 29,861 33,971,954 319,281,268 
Total Available For Sale$604,157,308 $1,031,139 $55,040,163 $550,148,284 
Schedule of Available For Sale Securities, Contractual Maturities Since MBS are not due at a single maturity date, they are disclosed separately, rather than allocated over the maturity groupings set forth in the table below.
March 31, 2023
Investments AFS:Amortized CostFair Value
One Year or Less$17,789 $17,640 
After One – Five Years4,587,262 4,529,933 
After Five – Ten Years74,277,652 70,811,848 
More Than Ten Years158,548,229 146,025,048 
MBS AFS350,265,323 319,685,604 
Total AFS$587,696,255 $541,070,073 
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value
The following table shows the gross unrealized losses and estimated fair value of available sale securities for which an allowance for credit losses has not been recorded aggregated by category and length of time that securities have been in a continuous unrealized loss position at March 31, 2023.
 March 31, 2023
 Less than 12 Months12 Months or MoreTotal
 Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
Student Loan Pools$6,532,605 $96,105 $44,272,894 $1,207,874 $50,805,499 $1,303,979 
SBA Bonds3,627,220 18,733 44,567,268 2,812,310 48,194,488 2,831,043 
Tax Exempt Municipal Bonds519,710 9,017 12,819,506 1,215,659 13,339,216 1,224,676 
Taxable Municipal Bonds— — 52,935,070 11,794,778 52,935,070 11,794,778 
MBS19,109,549 801,062 298,058,704 29,818,095 317,168,253 30,619,157 
 $29,789,084 $924,917 $452,653,442 $46,848,716 $482,442,526 $47,773,633 

The following table shows the gross unrealized losses and estimated fair value of available sale securities aggregated by category and length of time that securities have been in a continuous unrealized loss position at December 31, 2022.
 December 31, 2022
 Less than 12 Months12 Months or MoreTotal
 Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
Student Loan Pools$24,768,260 $637,963 $30,684,124 $1,071,360 $55,452,384 $1,709,323 
SBA Bonds8,403,975 120,766 45,969,373 3,126,157 54,373,348 3,246,923 
Tax Exempt Municipal Bonds8,050,944 718,645 4,929,289 913,174 12,980,233 1,631,819 
Taxable Municipal Bonds14,427,796 3,196,761 36,341,943 11,283,383 50,769,739 14,480,144 
MBS146,016,464 11,132,554 170,578,059 22,839,400 316,594,523 33,971,954 
 $201,667,439 $15,806,689 $288,502,788 $39,233,474 $490,170,227 $55,040,163