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Available for Sale Securities - Gains and Losses recognized from sales of AFS securities (Details) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Available for Sale Securities      
Gains recognized from sales of available-for-sale securities $ 138,000   $ 265,450
Losses recognized from sales of available-for-sale securities $ 48,000   $ 21,576
Debt Securities, Available-for-sale, Realized Gain (Loss)   $ 0