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Employee Stock Ownership Plan (Narrative) (Details)
 3 Months Ended 6 Months Ended
Dec. 01, 2020
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2020
USD ($)
h
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Sep. 30, 2020
shares
Jun. 30, 2020
shares
Sep. 30, 2019
shares
Jun. 30, 2019
shares
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]                  
Number of shares allocated to employees   468,663 452,763 468,663 452,763        
Number of shares owned   768,663 466,929 768,663 466,929        
Common stock, shares outstanding   2,702,633   2,702,633     2,402,633    
ESOP compensation expense | $   $ 56,274 $ 77,987 $ 56,274 $ 165,820        
Value of shares repurchased | $     $ 39,658   $ 47,949        
Common Stock [Member]                  
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]                  
Common stock, shares outstanding   2,702,633 2,401,033 2,702,633 2,401,033 2,402,633 2,402,633 2,402,880 2,401,213
Shares repurchased     (1,847)   (2,180)        
Shares distributed   300,000   300,000          
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                
Period of services rendered       15 years          
Price per share | $ / shares   $ 18.29   $ 18.29          
Aggregate purchase price | $       $ 5,487,000          
Loan, frequency of periodic payment       annual          
Number of loan repayment annual installments   15   15          
Interest rate on loan   3.00%   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                
Common stock, shares outstanding 2,702,633                
Shares repurchased     1,847   2,180        
Value of shares repurchased | $     $ 39,658   $ 47,949        
Shares distributed       456 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