Note 11 - Benefit Plans  | 
12 Months Ended | 
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Dec. 31, 2021  | |
| Notes to Financial Statements | |
| Defined Benefit Plan [Text Block] | 
    Note 11: Benefit Plans 
 During 2021, the Bank made final payouts for the Directors' Retirement Fund and Equity Value Plan. Both plans were fully accrued for prior to 2020. 
 The Bank sponsors a noncontributory Profit-Sharing Plan covering all employees who have worked more than 1,000 hours during the plan year. Profit sharing expense for the years ended 2021 and 2020 were $0. 
 Management implemented a 401(k)-benefit plan during 2007. Employee contributions are matched up to the first 6% of compensation contributed by the employee. Employer match contributions totaled $156,000 for 2021 and $163,000 for 2020. 
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- Definition The entire disclosure for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- References No definition available. 
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