Note 4: Loans and Allowance for Loan Losses: Performing Loans Classified as Troubled Debt Restructuring Loans (Details)	3 Months Ended		9 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019	Mar. 31, 2018
Total loans
modifications	8	9	18	9
Consumer Loan
modifications	0	2	0	2
Commercial Loan
modifications	3	2	5	2
Construction Loan Payable
modifications	0	0	0	0
Residential Real Estate
modifications	0	4	1	4
Commercial Real Estate
modifications	5	1	12	1
Performing Financial Instruments | Total loans
modifications	42	34
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 17,577	$ 11,685
Performing Financial Instruments | Consumer Loan
modifications	0	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 14
Performing Financial Instruments | Commercial Loan
modifications	10	8
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 5,086	$ 2,787
Performing Financial Instruments | Construction Loan Payable
modifications	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Performing Financial Instruments | Residential Real Estate
modifications	11	12
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,261	$ 800
Performing Financial Instruments | Commercial Real Estate
modifications	21	13
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 11,230	$ 8,084