Loans Receivable, Net (Past Due Financing Receivables) (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 530,627,188	$ 500,352,711
Accounts Receivable, before Allowance for Credit Loss, Current	528,167,136	497,935,526
Financing Receivable, before Allowance for Credit Loss, Noncurrent	2,460,052	2,417,185
Residential Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	77,416,918	78,907,159
Accounts Receivable, before Allowance for Credit Loss, Current	77,179,794	78,594,373
Financing Receivable, before Allowance for Credit Loss, Noncurrent	237,124	312,786
Consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	55,594,757	55,335,425
Accounts Receivable, before Allowance for Credit Loss, Current	55,126,775	54,920,447
Financing Receivable, before Allowance for Credit Loss, Noncurrent	467,982	414,978
Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	28,060,855	19,704,862
Accounts Receivable, before Allowance for Credit Loss, Current	28,032,881	19,648,156
Financing Receivable, before Allowance for Credit Loss, Noncurrent	27,974	56,706
Commercial Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	337,435,374	299,299,647
Accounts Receivable, before Allowance for Credit Loss, Current	335,708,402	297,666,932
Financing Receivable, before Allowance for Credit Loss, Noncurrent	1,726,972	1,632,715
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	1,686,736	1,077,508
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	320,412	292,498
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	18,318	49,554
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	1,348,006	735,456
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	229,267	530,094
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	130,958	152,634
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	88,653	30,610
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	9,656	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	0	346,850
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	544,049	809,583
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	106,166	160,152
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	58,917	91,870
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	0	7,152
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate 1 [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss, Noncurrent	$ 378,966	$ 550,409