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Investment Securities - Summary of Amortized Cost and Fair Values of Investment Securities (Detail) - USD ($) $ in Thousands | Mar. 31, 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 | $ 99,009 | $ 108,037
Available for sale, Gross Unrealized Gains | 2,322 | 741
Available for sale, Gross Unrealized Losses | 2,399 | 207
Available for sale, Fair Value | 98,932 | 108,571
Held to maturity, Amortized Cost | 11,219 | 12,192
Investment Securities, Amortized Cost | 110,228 | 120,229
Investment Securities, Gross Unrealized Gains | 2,821 | 1,205
Investment Securities, Gross Unrealized Losses | 2,402 | 209
Investment Securities, Fair Value | 110,647 | 121,225
State and Municipal [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Held to maturity, Amortized Cost | 11,219 | 12,192
Held to maturity, Gross Unrealized Gains | 499 | 464
Held to maturity, Gross Unrealized Losses | 3 | 2
Held to maturity, Fair Value | 11,715 | 12,654
U.S. Treasury and Agencies [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 1,000 | 2,500
Available for sale, Gross Unrealized Losses | 15 | 51
Available for sale, Fair Value | 985 | 2,449
Mortgage Backed Securities [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 87,255 | 94,983
Available for sale, Gross Unrealized Gains | 2,276 | 654
Available for sale, Gross Unrealized Losses | 1,951 | 152
Available for sale, Fair Value | 87,580 | 95,485
Corporate Bonds [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 10,754 | 10,554
Available for sale, Gross Unrealized Gains | 46 | 87
Available for sale, Gross Unrealized Losses | 433 | 4
Available for sale, Fair Value | $ 10,367 | $ 10,637

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