Fair Value of Financial Instruments - Non-recurring (Details) - USD ($)	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, net	$ 2,288,255	$ 2,288,255
Carrying value of impaired loans	437,807	454,853	$ 304,431
Impaired loans - related allowance	180,537	205,923	$ 136,116
Non-recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with a valuation allowance, net	257,270	248,930
Other real estate owned, net	2,288,255	2,288,255
Total	2,545,525	2,537,185
Non-recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with a valuation allowance, net	257,270	248,930
Other real estate owned, net	2,288,255	2,288,255
Total	$ 2,545,525	$ 2,537,185