Available-for-Sale Debt Securities by Original Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
One year or less, amortized cost	$ 45,686	$ 38,174
Greater than one year and less than five years, amortized cost	17,799	24,086
Amortized Cost	63,485	62,260
One year or less, fair value	45,734	38,173
Greater than one year and less than five years, fair value	17,569	23,786
Total available-for-sale securities fair value	$ 63,303	$ 61,959