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Intangible Assets, Net - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Finite Lived Intangible Assets Net [Abstract] |  |
Intangible assets | $ 19,773 | $ 19,773
Less accumulated amortization | (19,571) | (17,273)
Total | $ 202 | $ 2,500

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