Investment and Mortgage-Backed Securities, Available for Sale (Tables)

12 Months Ended

Dec. 31, 2018

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 investment and mortgage-backed securities available for sale at the dates indicated are as follows:

	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair value
Student Loan Pools	$	12,934,037	$	20,713	$	69,249	$	12,885,501
Small Business Administration (“SBA”) Bonds	125,777,016		560,352		890,837		125,446,531
Tax Exempt Municipal Bonds	60,141,164		1,518,974		329,769		61,330,369
Taxable Municipal Bonds	1,998,258		3,546		23,919		1,977,885
Mortgage-Backed Securities	185,291,038		1,073,432		1,903,919		184,460,551
Equity Securities	155,000		—		—		155,000
	$	386,296,513	$	3,177,017	$	3,217,693	$	386,255,837
	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair value
Student Loan Pools	$	8,522,043	$	1,288	$	1,546	$	8,521,785
SBA Bonds	123,324,802		1,113,160		189,518		124,248,444
Tax Exempt Municipal Bonds	59,623,185		2,789,233		56,851		62,355,567
Taxable Municipal Bonds	2,016,833		—		19,703		1,997,130
Mortgage-Backed Securities	186,732,705		1,936,847		973,572		187,695,980
Equity Securities	155,000		—		—		155,000
	$	380,374,568	$	5,840,528	$	1,241,190	$	384,973,906

Schedule of Available For Sale Securities, Contractual Maturities

	Amortized Cost		Fair Value
Due in less than one year	$	800,086	$	798,888
Due in one year to five years	8,644,891		8,640,449
Due in five to ten years	53,159,099		53,352,084
Due in ten years or more	138,401,399		139,003,865
Mortgage-Backed Securities	185,291,038		184,460,551
	$	386,296,513	$	386,255,837

Schedule of Temporarily Impaired Securities, Fair Value and Unrealized Losses

The tables below summarize gross unrealized losses and the related fair value, aggregated by investment category and length of time that individual available for sale securities have been in a continuous unrealized loss position for the periods indicated.

	December 31, 2018
	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Student Loan Pools	$	8,384,145	$	69,249	$	—	$	—	$	8,384,145	$	69,249
SBA Bonds	59,496,936		479,955		25,054,861		410,882		84,551,797		890,837
Tax Exempt Municipal Bonds	4,585,849		91,281		9,626,613		238,488		14,212,462		329,769
Taxable Municipal Bonds	—		—		980,520		23,919		980,520		23,919
Mortgage-Backed Securities	38,168,598		249,050		81,947,249		1,654,869		120,115,847		1,903,919
	$	110,635,528	$	889,535	$	117,609,243	$	2,328,158	$	228,244,771	$	3,217,693

	December 31, 2017
	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Student Loan Pools	$	7,556,014	$	1,546	$	—	$	—	$	7,556,014	$	1,546
SBA Bonds	24,433,422		151,459		5,588,532		38,059		30,021,954		189,518
Tax Exempt Municipal Bonds	4,406,162		13,852		4,328,229		42,999		8,734,391		56,851
Taxable Municipal Bonds	1,997,130		19,703		—		—		1,997,130		19,703
Mortgage-Backed Securities	62,574,910		624,772		23,612,359		348,800		86,187,269		973,572
	$	100,967,638	$	811,332	$	33,529,120	$	429,858	$	134,496,758	$	1,241,190