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Interest Expense on Convertible Senior Notes (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Debt Disclosure [Abstract] |  |
Contractual interest expense on the coupon | $ 312 | $ 732
Amortization of the discount component and debt issue fees recognized as interest expense | 113 | 209
Total interest expense on the convertible debt | $ 425 | $ 941

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