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Schedule of Allowance for Credit Losses on Financing Receivables (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance $ 6,467 $ 5,765 $ 5,459      
Charge-offs (1,116) (825) (1,160)      
Recoveries 124 127 66      
Provision for loan losses 3,300 1,400 1,400      
Balance 8,775 6,467 5,765      
Individually evaluated for loss       $ 266 $ 733 $ 310
Collectively evaluated for loss       8,509 5,734 5,455
Total 8,775 5,765 5,459 8,775 6,467 5,765
Individually evaluated for loss       12,462 8,680 8,691
Collectively evaluated for loss       701,052 529,712 486,556
Loans and Leases Receivable, Gross, Total       713,514 538,392 495,247
One To Four Family Residential Real Estate Loans [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 501 449        
Charge-offs (251) (56)        
Recoveries 1        
Provision for loan losses 609 107        
Balance 859 501 449      
Individually evaluated for loss       129 100
Collectively evaluated for loss       859 372 349
Total 859 449 449 859 501 449
Individually evaluated for loss       914 1,256 623
Collectively evaluated for loss       157,070 145,249 136,272
Loans and Leases Receivable, Gross, Total       157,984 146,505 136,895
Construction and Land Loans [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 271 168 181      
Charge-offs (191) (31)      
Recoveries      
Provision for loan losses 101 134 (13)      
Balance 181 271 168      
Individually evaluated for loss       191 103
Collectively evaluated for loss       181 80 65
Total 181 168 181 181 271 168
Individually evaluated for loss       1,137 1,479 1,808
Collectively evaluated for loss       24,969 20,980 18,275
Loans and Leases Receivable, Gross, Total       26,106 22,459 20,083
Commercial Real Estate Loans [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 1,386 1,686 1,540      
Charge-offs (131)      
Recoveries 13 1      
Provision for loan losses 1,214 (300) 145      
Balance 2,482 1,386 1,686      
Individually evaluated for loss       177 103 67
Collectively evaluated for loss       2,305 1,283 1,619
Total 2,482 1,686 1,540 2,482 1,386 1,686
Individually evaluated for loss       8,119 3,461 3,912
Collectively evaluated for loss       164,188 130,040 135,055
Loans and Leases Receivable, Gross, Total       172,307 133,501 138,967
Commercial Loan [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 1,815 1,051 1,226      
Charge-offs (292) (453) (950)      
Recoveries 3 53 22      
Provision for loan losses 862 1,164 753      
Balance 2,388 1,815 1,051      
Individually evaluated for loss       22 204 27
Collectively evaluated for loss       2,366 1,611 1,024
Total 2,388 1,051 1,226 2,388 1,815 1,051
Individually evaluated for loss       1,639 1,298 1,528
Collectively evaluated for loss       132,408 108,314 72,761
Loans and Leases Receivable, Gross, Total       134,047 109,612 74,289
Paycheck Protection Loans [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance          
Charge-offs          
Recoveries          
Provision for loan losses          
Balance        
Individually evaluated for loss          
Collectively evaluated for loss          
Total    
Individually evaluated for loss          
Collectively evaluated for loss       100,084    
Loans and Leases Receivable, Gross, Total       100,084    
Agriculture Loans [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 2,347 2,238 1,812      
Charge-offs (3)      
Recoveries 1      
Provision for loan losses 346 109 425      
Balance 2,690 2,347 2,238      
Individually evaluated for loss       67 106 13
Collectively evaluated for loss       2,623 2,241 2,225
Total 2,690 2,238 1,812 2,690 2,347 2,238
Individually evaluated for loss       614 1,124 717
Collectively evaluated for loss       95,918 97,434 95,915
Loans and Leases Receivable, Gross, Total       96,532 98,558 96,632
Municipal Loans [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 7 7 8      
Charge-offs      
Recoveries 6 6 2      
Provision for loan losses (7) (6) (3)      
Balance 6 7 7      
Individually evaluated for loss      
Collectively evaluated for loss       6 7 7
Total 6 7 8 6 7 7
Individually evaluated for loss       36 58 58
Collectively evaluated for loss       2,296 2,598 2,895
Loans and Leases Receivable, Gross, Total       2,332 2,656 2,953
Consumer Loan [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance 140 166 150      
Charge-offs (248) (285) (178)      
Recoveries 102 67 36      
Provision for loan losses 175 192 158      
Balance 169 140 166      
Individually evaluated for loss      
Collectively evaluated for loss       169 140 166
Total $ 169 166 150 169 140 166
Individually evaluated for loss       3 4 45
Collectively evaluated for loss       24,119 25,097 25,383
Loans and Leases Receivable, Gross, Total       $ 24,122 $ 25,101 25,428
One To Four Family Residential Real Estate [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Balance   449 542      
Charge-offs     (32)      
Recoveries     4      
Provision for loan losses     (65)      
Balance     449      
Total   $ 449 $ 449     $ 449