Note 12: Fair Value Measurements: Schedule of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	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 | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	41,043	35,400
Financial Assets | Interest-bearing time deposits
Financial Instruments Owned Carrying Amount	972	969
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	8,172
Financial Assets | Investment in Stock of Federal Reserve Bank of St. Louis
Financial Instruments Owned Carrying Amount	4,350	4,350
Financial Assets | Loans Receivable
Financial Instruments Owned Carrying Amount	1,922,785	1,846,405
Financial Assets | Accrued interest receivable
Financial Instruments Owned Carrying Amount	11,292	10,189
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount		5,233
Financial Liabilities | Deposits
Financial Instruments Owned Carrying Amount	1,914,614	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	114,646	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	1,925	2,099
Financial Liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	15,093	15,043
Commitments to Extend Credit
Financial Instruments Owned Carrying Amount	$ 0	$ 0