Available-for-Sale Debt Securities by Original Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
One year or less, amortized cost	$ 42,849	$ 38,174
Greater than one year and less than five years, amortized cost	20,053	24,086
Amortized Cost	62,902	62,260
One year or less, fair value	42,901	38,173
Greater than one year and less than five years, fair value	19,831	23,786
Total available-for-sale securities fair value	$ 62,732	$ 61,959