NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Financing Receivable Credit Quality Indicators (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Satisfactory | Loans Receivable
Loan Portfolio Internal Grading System Classification	$ 5,188,720	$ 5,005,765
Satisfactory | Commercial Loan
Loan Portfolio Internal Grading System Classification	1,206,342	1,322,861
Satisfactory | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	1,480,891	1,458,400
Satisfactory | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	14,165	13,189
Satisfactory | Automobile Loan
Loan Portfolio Internal Grading System Classification	98,659	150,874
Satisfactory | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	113,793	118,428
Satisfactory | Land Improvements
Loan Portfolio Internal Grading System Classification	40,224	40,431
Satisfactory | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	37,303	33,963
Satisfactory | Subdivision construction
Loan Portfolio Internal Grading System Classification	10,444	16,061
Satisfactory | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	475,479	385,001
Satisfactory | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	117,141	119,743
Satisfactory | Other residential
Loan Portfolio Internal Grading System Classification	1,018,359	866,006
Satisfactory | Commercial Borrower
Loan Portfolio Internal Grading System Classification	428,800	307,322
Satisfactory | Consumer Borrower
Loan Portfolio Internal Grading System Classification	41,003	46,294
Satisfactory | Acquired Loans Net of Discount
Loan Portfolio Internal Grading System Classification	106,117	127,192
Watch | Loans Receivable
Loan Portfolio Internal Grading System Classification	64,419	37,368
Watch | Commercial Loan
Loan Portfolio Internal Grading System Classification	0	0
Watch | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	52,496	32,063
Watch | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	0	0
Watch | Automobile Loan
Loan Portfolio Internal Grading System Classification	18	47
Watch | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	40	43
Watch | Land Improvements
Loan Portfolio Internal Grading System Classification	0	0
Watch | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	1,200	0
Watch | Subdivision construction
Loan Portfolio Internal Grading System Classification	0	27
Watch | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	0	26
Watch | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	321	419
Watch | Other residential
Loan Portfolio Internal Grading System Classification	0	0
Watch | Commercial Borrower
Loan Portfolio Internal Grading System Classification	10,258	4,651
Watch | Consumer Borrower
Loan Portfolio Internal Grading System Classification	86	92
Watch | Acquired Loans Net of Discount
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Loans Receivable
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Commercial Loan
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Automobile Loan
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Land Improvements
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Subdivision construction
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Other residential
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Commercial Borrower
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Consumer Borrower
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Acquired Loans Net of Discount
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Loans Receivable
Loan Portfolio Internal Grading System Classification	7,476	8,913
Substandard | Commercial Loan
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	3,056	3,709
Substandard | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Automobile Loan
Loan Portfolio Internal Grading System Classification	607	933
Substandard | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	524	517
Substandard | Land Improvements
Loan Portfolio Internal Grading System Classification	0	0
Substandard | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Subdivision construction
Loan Portfolio Internal Grading System Classification	22	0
Substandard | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	2,634	1,989
Substandard | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	237	181
Substandard | Other residential
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Commercial Borrower
Loan Portfolio Internal Grading System Classification	141	1,236
Substandard | Consumer Borrower
Loan Portfolio Internal Grading System Classification	244	334
Substandard | Acquired Loans Net of Discount
Loan Portfolio Internal Grading System Classification	11	14
Doubtful | Loans Receivable
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Commercial Loan
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Automobile Loan
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Land Improvements
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Subdivision construction
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Other residential
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Commercial Borrower
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Consumer Borrower
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Acquired Loans Net of Discount
Loan Portfolio Internal Grading System Classification	0	0
Internal Investment Grade Total | Loans Receivable
Loan Portfolio Internal Grading System Classification	5,260,615	5,052,046
Internal Investment Grade Total | Commercial Loan
Loan Portfolio Internal Grading System Classification	1,206,342	1,322,861
Internal Investment Grade Total | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	1,536,443	1,494,172
Internal Investment Grade Total | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	14,165	13,189
Internal Investment Grade Total | Automobile Loan
Loan Portfolio Internal Grading System Classification	99,284	151,854
Internal Investment Grade Total | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	114,357	118,988
Internal Investment Grade Total | Land Improvements
Loan Portfolio Internal Grading System Classification	40,224	40,431
Internal Investment Grade Total | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	38,503	33,963
Internal Investment Grade Total | Subdivision construction
Loan Portfolio Internal Grading System Classification	10,466	16,088
Internal Investment Grade Total | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	478,113	387,016
Internal Investment Grade Total | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	117,699	120,343
Internal Investment Grade Total | Other residential
Loan Portfolio Internal Grading System Classification	1,018,359	866,006
Internal Investment Grade Total | Commercial Borrower
Loan Portfolio Internal Grading System Classification	439,199	313,209
Internal Investment Grade Total | Consumer Borrower
Loan Portfolio Internal Grading System Classification	41,333	46,720
Internal Investment Grade Total | Acquired Loans Net of Discount
Loan Portfolio Internal Grading System Classification	$ 106,128	$ 127,206