Deposits (Details) - USD ($)	Dec. 31, 2022	Jun. 30, 2022
Deposits
Non-interest-bearing demand accounts	$ 24,912,223	$ 23,698,115
Demand, NOW, money market accounts	50,310,918	57,797,635
Savings accounts	45,022,584	46,601,748
Certificates of deposit	82,778,463	60,002,950
Total deposits	$ 203,024,188	$ 188,100,448
Non-interest-bearing demand accounts (in percent)	12.27%	12.60%
Demand, NOW, money market accounts (in percent)	24.78%	30.73%
Savings accounts (in percent)	22.18%	24.77%
Certificates of deposit (in percent)	40.77%	31.90%
Total (in percent)	100.00%	100.00%