Note 3: Securities: Repurchase Agreements, Collateral, Policy (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Assets Sold under Agreements to Repurchase, Carrying Amount	$ 141,000,000		$ 141,000,000		$ 124,200,000
Gain Recognized from Sales of Available for Sale Securities	265,450	$ 344,391	265,450	$ 395,843
Loss Recognized from Sale of Available for Sale Securities	21,576	$ 89,996	21,576	$ 104,341
US Government and Federal Agency Obligations
Assets Sold under Agreements to Repurchase, Carrying Amount	6,200,000		6,200,000		8,400,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets Sold under Agreements to Repurchase, Carrying Amount	44,500,000		44,500,000		39,800,000
Collateralized Mortgage Obligations
Assets Sold under Agreements to Repurchase, Carrying Amount	55,500,000		55,500,000		41,500,000
US States and Political Subdivisions Debt Securities
Assets Sold under Agreements to Repurchase, Carrying Amount	34,600,000		34,600,000		34,200,000
Other Securities
Assets Sold under Agreements to Repurchase, Carrying Amount	$ 200		$ 200		$ 300