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Investments Securities - Amortized Cost and Fair Values of Investment Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-sale |  |
Amortized Cost | $ 100,272 | $ 35,322
Gross Unrealized Gains | 0 | 6
Gross Unrealized Losses | (2,955) | (1)
Fair Value | 97,317 | 35,327
Held-to-maturity |  |
Amortized Cost | 1,036 | 1,296
Fair Value | 916 |
Total investment securities |  |
Amortized Cost | 101,308 | 36,618
Gross Unrealized Gains | 0 | 58
Gross Unrealized Losses | (3,075) | (1)
Fair Value | 98,233 | 36,675
U.S. Treasury securities |  |
Available-for-sale |  |
Amortized Cost | 99,967 | 34,999
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (2,952) | (1)
Fair Value | 97,015 | 34,998
U.S. Agency collateralized mortgage obligations |  |
Available-for-sale |  |
Amortized Cost | 54 | 68
Gross Unrealized Gains | 0 | 2
Gross Unrealized Losses | (3) | 0
Fair Value | 51 | 70
U.S. Agency residential mortgage-backed securities |  |
Available-for-sale |  |
Amortized Cost | 1 | 3
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 1 | 3
Held-to-maturity |  |
Amortized Cost | 1,036 | 1,296
Gross Unrealized Gains | 0 | 52
Gross Unrealized Losses | (120) | 0
Fair Value | 916 | 1,348
Municipal bonds |  |
Available-for-sale |  |
Amortized Cost | 250 | 252
Gross Unrealized Gains | 0 | 4
Gross Unrealized Losses | 0 | 0
Fair Value | $ 250 | $ 256

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