Disclosures About Fair Value of Assets and Liabilities - Fair values of financial instruments not previously presented (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 37,735,266	$ 11,089,189	$ 10,266,824
Loans held for sale	3,114,081	1,282,000
Loans, net of allowance for loan losses	179,332,026	170,365,031
Federal Home Loan Bank stock	2,657,400	2,583,100
Interest receivable	624,333	569,659
Federal Home Loan Bank lender risk account receivable	1,713,240	1,703,276
Deposits	143,410,707	142,391,756
Federal Home Loan Bank advances	47,172,066	28,580,438
Stock subscription proceeds in escrow	23,407,011
Advances from borrowers for taxes and insurance	1,806,638	1,799,419
Interest payable	91,636	53,945
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of allowance for loan losses	51,568	744,381
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	37,735,266	11,089,189
Loans held for sale	0	0
Loans, net of allowance for loan losses	0	0
Federal Home Loan Bank stock	0	0
Financial Liabilities Fair Value Disclosure	23,407,011
Fair Value, Inputs, Level 1 [Member] | Accrued Interest Receivables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable	0	0
Fair Value, Inputs, Level 1 [Member] | Federal Home Loan Bank [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable	0	0
Fair Value, Inputs, Level 1 [Member] | Tax [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Interest Payable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	66,172,775	61,842,846
Fair Value, Inputs, Level 1 [Member] | Federal Home Loan Bank Advances [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of allowance for loan losses	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Loans held for sale	3,178,068	1,307,890
Loans, net of allowance for loan losses	0	0
Federal Home Loan Bank stock	2,657,400	2,583,100
Financial Liabilities Fair Value Disclosure	0
Fair Value, Inputs, Level 2 [Member] | Accrued Interest Receivables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable	624,333	569,659
Fair Value, Inputs, Level 2 [Member] | Federal Home Loan Bank [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable	0	0
Fair Value, Inputs, Level 2 [Member] | Tax [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	1,806,638	1,799,419
Fair Value, Inputs, Level 2 [Member] | Interest Payable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	91,636	53,945
Fair Value, Inputs, Level 2 [Member] | Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	78,065,313	80,152,017
Fair Value, Inputs, Level 2 [Member] | Federal Home Loan Bank Advances [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	47,707,920	28,460,471
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of allowance for loan losses	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Loans held for sale	0	0
Loans, net of allowance for loan losses	175,117,724	174,545,610
Federal Home Loan Bank stock	0	0
Financial Liabilities Fair Value Disclosure	0
Fair Value, Inputs, Level 3 | Accrued Interest Receivables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable	0	0
Fair Value, Inputs, Level 3 | Federal Home Loan Bank [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable	1,820,707	1,677,187
Fair Value, Inputs, Level 3 | Tax [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Interest Payable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Federal Home Loan Bank Advances [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of allowance for loan losses	$ 51,568	$ 744,381