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Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Payables and Accruals [Abstract] |  |
Wages and bonus | $ 35,027 | $ 26,643
Dividends | 36,764 | 36,919
Research and development payable | 6,722 | 5,693
License fees and royalties | 9,034 | 9,371
Professional fees | 1,869 | 1,772
Equipment | 2,145 | 557
Lease liabilities – current portion | 3,058 | 3,046
Others | 10,599 | 12,075
Accrued expenses and other current liabilities | $ 105,218 | $ 96,076

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