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Available-for-Sale Debt Securities by Original Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
One year or less, amortized cost	$ 52,805	$ 38,174
Greater than one year and less than five years, amortized cost	11,403	24,086
Amortized Cost	64,208	62,260
One year or less, fair value	52,894	38,173
Greater than one year and less than five years, fair value	11,228	23,786
Total available-for-sale securities fair value	$ 64,122	$ 61,959

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- Definition

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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