Fair Value Measurements and Financial Instruments - Cash Equivalents (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 2,884	$ 5,860
Estimated Fair Value	2,884	5,860
Money Market Funds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	2,884	5,860
Estimated Fair Value	2,884	5,860
Cash and Cash Equivalents
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Value	$ 2,884	$ 5,860