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Investments and Fair Value Instruments - Summary of Amortized Cost and Fair Value of Investment Securities Portfolio (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 9,948 | $ 18,620
Unrealized Gains | 101 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 10,049 | 18,620
Cash Equivalents [Member] | Money Market Funds [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 4,925 | 18,620
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 4,925 | $ 18,620
Short-term Investments [Member] | Treasury Bills [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 5,023 |
Unrealized Gains | 101 |
Unrealized Losses | 0 |
Estimated Fair Value | $ 5,124 |

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