Employee Stock Ownership Plan (Narrative) (Details)		12 Months Ended
	Dec. 01, 2020 $ / shares shares	Jun. 30, 2021 USD ($) h $ / shares shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 shares
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Common stock, shares outstanding		2,702,633	2,402,633	2,401,213
ESOP compensation expense | $		$ 353,897	$ 305,006
Value of shares repurchased | $			$ 47,949
Shares distributed		300,000
Common Stock [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Common stock, shares outstanding		2,702,633	2,402,633	2,401,213
Shares repurchased			(2,180)
Employee Stock Ownership Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of hours worked per year to quality for the plan | h		1,000
Number of shares allocated to employees	469,119	487,220	466,929
Period of services rendered		15 years
Price per share | $ / shares		$ 18.29
Aggregate purchase price | $		$ 5,487,000
Loan, frequency of periodic payment		annual
Number of loan repayment annual installments		15
Interest rate on loan		3.00%
Purchase price per share, lower range limit | $ / shares		$ 18.04
Purchase price per share, upper range limit | $ / shares		$ 19.43
Number of shares owned	769,119	766,649	466,929
Common stock, shares outstanding	2,702,633
ESOP compensation expense | $		$ 353,897	$ 305,006
Shares repurchased			2,180
Value of shares repurchased | $			$ 47,949
Shares distributed		2,470	2,180
Employee Stock Ownership Plan [Member] | Common Stock [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares sold	300,000
Sale of stock, price per share | $ / shares	$ 0.3333