Investment and Mortgage-Backed Securities, Available for Sale (Schedule of Temporarily Impaired Securities, Fair Value and Unrealized losses) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Available For Sale, Percent of Unrealized Losses for Securities in a Continuous Loss Position, 12 Months or Longer	19.80%	37.00%
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 112,684,725	$ 106,073,904
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	68,682,919	82,910,611
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	181,367,644	188,984,515
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	1,927,669	1,430,106
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	475,533	839,780
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	2,403,202	2,269,886
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,940,355	7,196,541
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	15,886,608	29,460,703
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	18,826,963	36,657,244
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	5,772	46,207
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	90,325	336,779
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	96,097	382,986
SBA Bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	30,907,292	39,843,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	40,220,055	43,907,816
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	71,127,347	83,751,616
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	525,695	653,518
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	312,862	403,936
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	838,557	1,057,454
Taxable Municipal Bonds [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,892,198	7,092,538
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,532,001	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	14,424,199	7,092,538
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	294,826	75,168
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	14,199	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	309,025	75,168
Mortgage-Backed Securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	66,944,880	51,941,025
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	10,044,255	9,542,092
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	76,989,135	61,483,117
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	1,101,376	655,213
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	58,147	99,065
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	$ 1,159,523	$ 754,278