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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Statement Of Financial Position [Abstract]    
Securities held to maturity, fair value $ 12,654 $ 15,503
Common stock, no par value
Common stock, shares authorized 10,000,000 10,000,000
Common stock, shares, issued 5,658,585 2,792,885
Common stock, shares, outstanding 5,658,585 2,792,885