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Deposits - Composition of Deposits (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Banking and Thrift [Abstract]    
Non-interest bearing checking $ 58,982 $ 85,988
Interest bearing checking 26,073 25,556
Money market 67,325 59,071
Statement savings 49,610 53,245
Certificates of deposit 155,985 182,277
Total $ 357,975 $ 406,137