Fair Value of Financial Instruments - Non-recurring (Details) - USD ($)	Mar. 31, 2020	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, net	$ 3,302,148	$ 4,080,401
Fair value on non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with a valuation allowance, net	188,183	274,750
Other real estate owned, net	3,302,148	4,080,401
Total	3,490,331	4,355,151
Fair value on non-recurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with a valuation allowance, net	0	0
Other real estate owned, net	0	0
Total	0	0
Fair value on non-recurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with a valuation allowance, net	0	0
Other real estate owned, net	0	0
Total	0	0
Fair value on non-recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with a valuation allowance, net	188,183	274,750
Other real estate owned, net	3,302,148	4,080,401
Total	$ 3,490,331	$ 4,355,151