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Fair Value Measurements and Financial Instruments - Cash Equivalents (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 3,904	$ 5,860
Estimated Fair Value	3,904	5,860
Money Market Funds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	3,904	5,860
Estimated Fair Value	3,904	5,860
Cash and Cash Equivalents
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Value	$ 3,904	$ 5,860

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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