Debt Securities - Contractual maturity (Details) - USD ($)	Dec. 31, 2022	Jun. 30, 2022
Available for sale securities, Amortized cost
Due from more than one to five years	$ 3,392,837
Due from more than five to ten years	4,650,409
Total amortized cost with maturity	8,043,246
Amortized cost	10,327,361	$ 11,053,947
Available for sale securities, Fair value
Due from more than one to five years	3,280,266
Due from more than five to ten years	3,940,303
Total fair value with maturity	7,220,569
Fair Value	9,414,015	10,617,238
Held to maturity securities, Amortized cost
Amortized cost	521,228	532,363
Held to maturity securities, Fair value
Fair Value	390,093	419,000
Mortgage-backed
Available for sale securities, Amortized cost
Without single maturity	2,284,115
Amortized cost	2,284,115	2,825,546
Available for sale securities, Fair value
Without single maturity	2,193,446
Fair Value	2,193,446	2,739,054
Held to maturity securities, Amortized cost
Without single maturity	521,228
Amortized cost	521,228	532,363
Held to maturity securities, Fair value
Without single maturity	390,093
Fair Value	$ 390,093	$ 419,000