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Summary of Significant Accounting Policies (Details) - USD ($)
9 Months Ended
Apr. 30, 2019
Mar. 31, 2020
Jun. 30, 2019
Feb. 15, 2012
Impairment of Federal Home Loan Bank stock   $ 0    
Consecutive period of employee's average month pay received to determine benefits under the Plan   5 years    
Number of years of employment to determine pension benefit   10 years    
Minimum Tier 1 capital of average assets   4.00% 4.00% 8.00%
Minimum total risk-based capital of risk weighted assets, revising capital plan submitted to FDIC and WDFI   6.00% 6.00% 12.00%
TEB MHC        
Shares of common stock sold 1,309,547      
Price per share $ 10.00      
Percentage of outstanding shares issued 49.90%      
Gross proceeds from issuance $ 13,100,000      
Net proceeds from issuance of common stock 11,400,000      
Payments Of Initial Capitalization $ 100,000      
Number of shares held by mutual holding company 1,314,796      
Percentage of outstanding shares held by mutual holding company 50.10%      
Cost of the reorganization and the issuing of the common stock, deferred $ 1,649,899