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Detail of Interest and Other Income, Net (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Other Income And Expenses [Abstract] |  |
Interest income | $ 561 | $ 2,145
Miscellaneous income (expense) | 659 | (39)
Other | (91) | (7)
Total interest and other income, net | $ 1,129 | $ 2,099

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