Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Cost	$ 18,615	$ 31,894
Fair Market Value	18,615	31,894
Cash [Member]
Summary of Investment Holdings [Line Items]
Cost	18,571	31,852
Fair Market Value	18,571	31,852
Money Market Funds [Member]
Summary of Investment Holdings [Line Items]
Cost	44	42
Fair Market Value	$ 44	$ 42