Note 12: Fair Value Measurements: Schedule of Financial Instruments (Details) - USD ($)	Mar. 31, 2020	Jun. 30, 2019
Letter of Credit
Financial Instruments Owned Carrying Amount	$ 0	$ 0
Line of Credit
Financial Instruments Owned Carrying Amount	0	0
Financial assets | Loans Receivable
Financial Instruments Owned Carrying Amount	1,967,820	1,846,405
Financial assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	56,105	35,400
Financial assets | Interest-bearing time deposits
Financial Instruments Owned Carrying Amount	973	969
Financial assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	8,701	5,233
Financial assets | Investment in Stock of Federal Reserve Bank of St. Louis
Financial Instruments Owned Carrying Amount	4,353	4,350
Financial assets | Accrued interest receivable
Financial Instruments Owned Carrying Amount	9,754	10,189
Financial liabilities | Deposits
Financial Instruments Owned Carrying Amount	1,971,647	1,893,695
Financial liabilities | Securities Sold under Agreements to Repurchase
Financial Instruments Owned Carrying Amount	0	4,376
Financial liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	123,361	44,908
Financial liabilities | Note payable
Financial Instruments Owned Carrying Amount	3,000	3,000
Financial liabilities | Accrued interest payable
Financial Instruments Owned Carrying Amount	1,753	2,099
Financial liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	15,118	15,043
Commitments to Extend Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Letter of Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Line of Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial assets | Loans Receivable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	56,105	35,400
Fair Value, Inputs, Level 1 | Financial assets | Interest-bearing time deposits
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial assets | Investment in Stock of Federal Reserve Bank of St. Louis
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial assets | Accrued interest receivable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial liabilities | Deposits
Financial Instruments Owned Carrying Amount	1,316,854	1,214,606
Fair Value, Inputs, Level 1 | Financial liabilities | Securities Sold under Agreements to Repurchase
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial liabilities | Note payable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial liabilities | Accrued interest payable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Financial liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 1 | Commitments to Extend Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Letter of Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Line of Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Financial assets | Loans Receivable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Financial assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Financial assets | Interest-bearing time deposits
Financial Instruments Owned Carrying Amount	973	969
Fair Value, Inputs, Level 2 | Financial assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	8,701	5,233
Fair Value, Inputs, Level 2 | Financial assets | Investment in Stock of Federal Reserve Bank of St. Louis
Financial Instruments Owned Carrying Amount	4,353	4,350
Fair Value, Inputs, Level 2 | Financial assets | Accrued interest receivable
Financial Instruments Owned Carrying Amount	9,754	10,189
Fair Value, Inputs, Level 2 | Financial liabilities | Deposits
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Financial liabilities | Securities Sold under Agreements to Repurchase
Financial Instruments Owned Carrying Amount	0	4,376
Fair Value, Inputs, Level 2 | Financial liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	125,330	45,547
Fair Value, Inputs, Level 2 | Financial liabilities | Note payable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Financial liabilities | Accrued interest payable
Financial Instruments Owned Carrying Amount	1,753	2,099
Fair Value, Inputs, Level 2 | Financial liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 2 | Commitments to Extend Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Letter of Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Line of Credit
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial assets | Loans Receivable
Financial Instruments Owned Carrying Amount	1,958,438	1,823,040
Fair Value, Inputs, Level 3 | Financial assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial assets | Interest-bearing time deposits
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial assets | Investment in Stock of Federal Reserve Bank of St. Louis
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial assets | Accrued interest receivable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial liabilities | Deposits
Financial Instruments Owned Carrying Amount	655,493	678,301
Fair Value, Inputs, Level 3 | Financial liabilities | Securities Sold under Agreements to Repurchase
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial liabilities | Note payable
Financial Instruments Owned Carrying Amount	3,000	3,000
Fair Value, Inputs, Level 3 | Financial liabilities | Accrued interest payable
Financial Instruments Owned Carrying Amount	0	0
Fair Value, Inputs, Level 3 | Financial liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	9,855	15,267
Fair Value, Inputs, Level 3 | Commitments to Extend Credit
Financial Instruments Owned Carrying Amount	$ 0	$ 0