Debt Securities - Contractual maturity (Details) - USD ($)	Sep. 30, 2021	Jun. 30, 2021
Available for sale securities, Amortized cost
Due in one year or less	$ 1,158,810
Due from more than one to five years	4,327,447
Due from more than five to ten years	2,584,290
Total amortized cost with maturity	8,070,547
Amortized cost	11,992,364	$ 10,649,706
Available for sale securities, Fair value
Due in one year or less	1,178,025
Due from more than one to five years	4,397,975
Due from more than five to ten years	2,598,894
Total fair value with maturity	8,174,894
Fair Value	12,246,677	10,909,764
Held to maturity securities, Amortized cost
Amortized cost	657,872	708,949
Held to maturity securities, Fair value
Fair Value	697,039	770,438
Mortgage-backed
Available for sale securities, Amortized cost
Without single maturity	3,921,817
Amortized cost	3,921,817	4,557,465
Available for sale securities, Fair value
Without single maturity	4,071,783
Fair Value	4,071,783	4,711,568
Held to maturity securities, Amortized cost
Without single maturity	657,872
Amortized cost	657,872	708,949
Held to maturity securities, Fair value
Without single maturity	697,039
Fair Value	$ 697,039	$ 770,438