Note 11: Fair Value Measurements: Schedule of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018
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	22,130	26,326
Financial Assets | Interest-bearing time deposits
Financial Instruments Owned Carrying Amount	1,956	1,953
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	7,441	5,661
Financial Assets | Investment In Stock Of Federal Reserve Bank Of St Louis
Financial Instruments Owned Carrying Amount	3,566	3,566
Financial Assets | Loans Receivable
Financial Instruments Owned Carrying Amount	1,624,156	1,563,380
Financial Assets | Accrued interest receivable
Financial Instruments Owned Carrying Amount	9,612	7,992
Financial Liabilities | Deposits
Financial Instruments Owned Carrying Amount	1,591,126	1,579,902
Financial Liabilities | Securities Sold under Agreements to Repurchase
Financial Instruments Owned Carrying Amount	3,631	3,267
Financial Liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	118,307	76,652
Financial Liabilities | Note Payable
Financial Instruments Owned Carrying Amount	3,000	3,000
Financial Liabilities | Accrued interest payable
Financial Instruments Owned Carrying Amount	1,391	1,206
Financial Liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	14,969	14,945
Commitments to Extend Credit
Financial Instruments Owned Carrying Amount	$ 0	$ 0