Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	$ 3,447	$ 635
Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	1,507	1,112
Fair Value, Inputs, Level 1 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	3,447	635
Fair Value, Inputs, Level 3 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	$ 1,507	$ 1,112