Debt Securities - Contractual maturity (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020
Available for sale securities, Amortized cost
Due in one year or less	$ 946,083
Due from more than one to five years	4,561,900
Due from more than five to ten years	584,258
Total amortized cost with maturity	6,092,241
Amortized cost	10,649,706	$ 14,647,048
Available for sale securities, Fair value
Due in one year or less	966,300
Due from more than one to five years	4,630,702
Due from more than five to ten years	601,194
Total fair value with maturity	6,198,196
Fair Value	10,909,764	15,008,087
Held to maturity securities, Amortized cost
Amortized cost	708,949	2,841,353
Held to maturity securities, Fair value
Fair Value	770,438	3,158,960
Mortgage-backed
Available for sale securities, Amortized cost
Without single maturity	4,557,465
Amortized cost	4,557,465	8,449,561
Available for sale securities, Fair value
Without single maturity	4,711,568
Fair Value	4,711,568	8,674,729
Held to maturity securities, Amortized cost
Without single maturity	708,949
Amortized cost	708,949	2,841,353
Held to maturity securities, Fair value
Without single maturity	770,438
Fair Value	$ 770,438	$ 3,158,960