Income Taxes - Effective tax rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Income Taxes
Federal income tax at statutory rate, Amount	$ 2,700	$ 2,139
Federal income tax at statutory rate, Tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit, Amount	$ 988	$ 614
State income tax, net of federal income tax benefit, Tax rate	7.68%	6.05%
Bank-owned life insurance, Amount	$ (39)	$ (40)
Bank-owned life insurance, Tax Rate	(0.31%)	(0.39%)
Non-deductible expenses, Amount	$ 8	$ 6
Non-deductible expenses, Tax Rate	0.06%	0.06%
Non-deductible stock-based compensation, Amount	$ 0	$ (30)
Non-deductible stock-based compensation, Tax Rate	0.00%	(0.30%)
Excess tax benefit on stock-based compensation	$ 0	$ (64)
Excess tax benefit on stock-based compensation, Tax rate	0.00%
Return to provision adjustment, Amount	$ 107
Return to provision adjustment, Tax rate	0.84%
Other, Amount	$ 1	$ 1
Other, Tax Rate	0.01%	(0.64%)
Effective income tax, Amount	$ 3,765	$ 2,626
Effective income tax, Tax rate	29.28%	25.78%