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Investment Securities - Summary of Amortized Cost and Fair Values of Investment Securities (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | $ 104,617 | $ 108,037
Available for sale, Gross Unrealized Gains | 1,448 | 741
Available for sale, Gross Unrealized Losses | 1,584 | 207
Available for sale, Fair Value | 104,481 | 108,571
Held to maturity, Amortized Cost |  | 12,192
Investment Securities, Amortized Cost |  | 120,229
Investment Securities, Gross Unrealized Gains |  | 1,205
Investment Securities, Gross Unrealized Losses |  | 209
Investment Securities, Fair Value |  | 121,225
State and Municipal [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 12,150 |
Available for sale, Gross Unrealized Gains | 115 |
Available for sale, Fair Value | 12,265 |
Held to maturity, Amortized Cost |  | 12,192
Held to maturity, Gross Unrealized Gains |  | 464
Held to maturity, Gross Unrealized Losses |  | 2
Held to maturity, Fair Value |  | 12,654
Mortgage Backed Securities [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 80,713 | 94,983
Available for sale, Gross Unrealized Gains | 1,254 | 654
Available for sale, Gross Unrealized Losses | 1,366 | 152
Available for sale, Fair Value | 80,601 | 95,485
U.S. Treasury and Agencies [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost |  | 2,500
Available for sale, Gross Unrealized Losses |  | 51
Available for sale, Fair Value |  | 2,449
Corporate Bonds [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 11,754 | 10,554
Available for sale, Gross Unrealized Gains | 79 | 87
Available for sale, Gross Unrealized Losses | 218 | 4
Available for sale, Fair Value | $ 11,615 | $ 10,637

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