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Allowances for Loan Losses - Summary of Balance of Loans Individually Evaluated vs. Collectively Evaluated for Impairment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance $ 3,890 $ 3,443 $ 3,152 $ 2,875 $ 2,787 $ 2,789 $ 2,702
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 3,890   3,152     2,789  
Loans, Ending balance 790,181   715,039     236,840  
Loans, Ending balance: individually evaluated for impairment 8,297   751     297  
Ending balance: loans acquired with deteriorated credit quality 5,567   5,556        
Loans, Ending balance: collectively evaluated for impairment 776,317   708,732     236,543  
Agriculture Loans [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 17 20 23 98 105 120 152
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 17   23     120  
Loans, Ending balance 7,710   9,341     11,246  
Loans, Ending balance: individually evaluated for impairment 200   0     0  
Ending balance: loans acquired with deteriorated credit quality 0   0        
Loans, Ending balance: collectively evaluated for impairment 7,510   9,341     11,246  
Commercial and PPP Loans [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 506   582 352   290 312
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 506   582     290  
Loans, Ending balance 90,979   122,378     21,534  
Loans, Ending balance: individually evaluated for impairment 2,451   42     2  
Ending balance: loans acquired with deteriorated credit quality 601   512        
Loans, Ending balance: collectively evaluated for impairment 87,927   121,824     21,532  
Commercial Real Estate Loans [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 1,786 1,070 799 340 315 314 255
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 1,786   799     314  
Loans, Ending balance 435,588   338,749     27,261  
Loans, Ending balance: individually evaluated for impairment 2,501   0     0  
Ending balance: loans acquired with deteriorated credit quality 4,369   4,394        
Loans, Ending balance: collectively evaluated for impairment 428,718   334,355     27,261  
Residential Real Estate Loans [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 1,547 1,728 1,634 1,670 1,674 1,702 1,707
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 1,547   1,634     1,702  
Loans, Ending balance 241,401   231,302     167,536  
Loans, Ending balance: individually evaluated for impairment 3,145   709     295  
Ending balance: loans acquired with deteriorated credit quality 597   650        
Loans, Ending balance: collectively evaluated for impairment 237,659   229,943     167,241  
Consumer Loans [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 21 13 22 23 24 35 43
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 21   22     35  
Loans, Ending balance 8,689   7,087     2,514  
Loans, Ending balance: individually evaluated for impairment 0   0     0  
Ending balance: loans acquired with deteriorated credit quality 0   0        
Loans, Ending balance: collectively evaluated for impairment 8,689   7,087     2,514  
Municipal Loans [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 13 15 15 16 18 18 13
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment 13   15     18  
Loans, Ending balance 5,814   6,182     6,749  
Loans, Ending balance: individually evaluated for impairment 0   0     0  
Ending balance: loans acquired with deteriorated credit quality 0   0        
Loans, Ending balance: collectively evaluated for impairment 5,814   6,182     6,749  
Unallocated [Member]              
Loans and Leases Receivable Disclosure [Line Items]              
Allowance for Loan Losses, Ending balance 0 $ 12 77 $ 376 $ 336 310 $ 220
Allowance for Loan Losses, Ending balance: individually evaluated for impairment 0   0     0  
Allowance for Loan Losses, Ending balance: collectively evaluated for impairment $ 0   $ 77     $ 310