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Goodwill and Intangibles - Schedule of Amortizable Intangibles Included in Other Assets on Balance Sheet (Detail) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles $ 3,718,319 $ 1,312,915
Customer Based [Member] | MoneyWise Payroll [Member]    
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles 541,272 738,098
Customer Based [Member] | Hammond Insurance [Member]    
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles 374,986  
Customer Based [Member] | LenderSelect [Member]    
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles 720,489  
Core Deposits [Member] | River Bancorp, Inc. [Member]    
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles 211,036 437,954
Core Deposits [Member] | Virginia Community Bankshares, Inc [Member]    
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles 1,690,000  
Other [Member]    
Finite Lived Intangible Assets [Line Items]    
Amortizable Intangibles $ 180,536 $ 136,863