Deposits (Details) - USD ($)	Sep. 30, 2022	Jun. 30, 2022
Deposits
Non-interest-bearing demand accounts	$ 26,412,999	$ 23,698,115
Total deposits	187,752,715	188,100,448
Demand, NOW, money market accounts	49,098,215	57,797,635
Savings accounts	46,317,048	46,601,748
Certificates of deposit	$ 65,924,453	$ 60,002,950
Non-interest-bearing demand accounts (in percent)	14.07%	12.60%
Demand, NOW, money market accounts (in percent)	26.15%	30.73%
Savings accounts (in percent)	24.67%	24.77%
Certificates of deposit (in percent)	35.11%	31.90%
Total (in percent)	100.00%	100.00%