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Investment Securities - Additional Information (Details)
 3 Months Ended
Mar. 31, 2020
USD ($)
Security
Dec. 31, 2019
USD ($)
Security
Held-to-maturity Securities [Abstract]    
Number of securities in unrealized loss positions, twelve months or more | Security 2 3
Held to maturity sale securities aggregate market value $ 811,000 $ 1,330,000
Held-to-maturity securities unrealized aggregate loss 40,000 7,000
Gain (Loss) on Sale of Investments [Abstract]    
Securities pledged to collateralize deposit 113,500,000 92,400,000
Securities pledged to collateralize borrowing $ 25,600,000 $ 21,300,000
Municipal Securities [Member]    
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]    
Months of unrealized loss positions 12 months  
Fixed Rate, Private-label Asset-backed Security Rated [Member]    
Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Number of securities in unrealized loss positions, twelve months or more | Security 1  
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis $ 381,000  
Available for sale securities aggregate market value 367,000  
Available for sale securities unrealized aggregate loss $ 14,000  
Available for sale securities unrealized aggregate loss percentage 3.80%  
Fixed Rate, Private-label Mortgage-backed Security not Rated [Member]    
Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Number of securities in unrealized loss positions, twelve months or more | Security 4  
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis $ 4,700,000  
Available for sale securities aggregate market value 4,300,000  
Available for sale securities unrealized aggregate loss $ 355,000  
Available for sale securities unrealized aggregate loss percentage 8.20%  
Held-to-maturity Securities [Abstract]    
Number of securities in unrealized loss positions, twelve months or more | Security 2  
Held to maturity securities continuous unrealized loss position greater than twelve months amortized historical cost basis $ 851,000  
Held to maturity sale securities aggregate market value 811,000  
Held-to-maturity securities unrealized aggregate loss $ 40,000  
Held-to-maturity securities unrealized aggregate loss percentage 4.90%