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Loans (Details 2) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 $ 11,179 $ 10,389 $ 10,389
Charge-offs (14) (25) (182)
Recoveries 23 22 637
Provisions (125) 177 335
Ending balance December 31, 2021 11,063 10,563 11,179
Individually evaluated for impairment 2
Collectively evaluated for impairment 11,063 10,561 11,179
Ending balance-total 875,797 869,066 863,702
Individually evaluated for impairment 1,541 6,035 1,694
Collectively evaluated for impairment 874,256 863,031 862,008
Commercial, Financial And Agricultural Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 853 778 778
Charge-offs
Recoveries 11 1 39
Provisions (15) (21) 36
Ending balance December 31, 2021 849 758 853
Individually evaluated for impairment
Collectively evaluated for impairment 849 758 853
Ending balance-total 70,565 110,776 69,952
Individually evaluated for impairment
Collectively evaluated for impairment 70,565 110,776 69,952
Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 113 145 145
Charge-offs
Recoveries
Provisions (22) (11) (32)
Ending balance December 31, 2021 91 134 113
Individually evaluated for impairment
Collectively evaluated for impairment 91 134 113
Ending balance-total 96,419 104,065 94,969
Individually evaluated for impairment
Collectively evaluated for impairment 96,419 104,065 94,969
Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 560 541 541
Charge-offs
Recoveries 10
Provisions (47) (61) 9
Ending balance December 31, 2021 513 480 560
Individually evaluated for impairment
Collectively evaluated for impairment 513 480 560
Ending balance-total 42,675 38,947 45,498
Individually evaluated for impairment 42 436 133
Collectively evaluated for impairment 42,633 38,511 45,365
Commercial Real Estate [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 8,570 7,855 7,855
Charge-offs (110)
Recoveries 6 4 473
Provisions (68) 278 352
Ending balance December 31, 2021 8,508 8,137 8,570
Individually evaluated for impairment 2 1
Collectively evaluated for impairment 8,508 8,135 8,569
Ending balance-total 627,621 582,083 617,464
Individually evaluated for impairment 1,499 5,578 1,561
Collectively evaluated for impairment 626,122 576,505 615,903
Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 333 324 324
Charge-offs
Recoveries 3 1 69
Provisions (5) (16) (60)
Ending balance December 31, 2021 331 309 333
Individually evaluated for impairment
Collectively evaluated for impairment 331 309 333
Ending balance-total 27,712 25,068 27,116
Individually evaluated for impairment 21
Collectively evaluated for impairment 27,712 25,047 27,116
Consumer Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 126 125 125
Charge-offs (14) (25) (72)
Recoveries 3 16 46
Provisions 35 8 27
Ending balance December 31, 2021 150 124 126
Individually evaluated for impairment
Collectively evaluated for impairment 150 124 126
Ending balance-total 10,805 8,127 8,703
Individually evaluated for impairment
Collectively evaluated for impairment 10,805 8,127 8,703
Unallocated Financing Receivables [Member]      
Financing Receivable, Past Due [Line Items]      
Beginning balance December 31, 2020 624 621 621
Charge-offs
Recoveries
Provisions (3) 3
Ending balance December 31, 2021 621 621 624
Individually evaluated for impairment
Collectively evaluated for impairment 621 621 624
Ending balance-total
Individually evaluated for impairment
Collectively evaluated for impairment