Available for Sale Securities - Unrealized losses (Details) - Obligations of states and political subdivisions	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($) item
Debt Securities, Available-for-sale [Line Items]
Continuous Unrealized Losses Existing for Less Than 12 Months, Fair Value	$ 0	$ 208,583
Continuous Unrealized Losses Existing for Less Than 12 Months, Unrealized Losses	0	22
Continuous Unrealized Losses Existing for 12 Months or Greater, Fair Value	693,687	2,935,133
Continuous Unrealized Losses Existing for 12 Months or Greater, Unrealized Losses	16,056	58,592
Total, Fair Value	693,687	3,143,716
Total, Unrealized Losses	$ 16,056	$ 58,614
Number of securities with unrealized loss position | item	2	12