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Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Maturities of Marketable Securities Available-for-Sale (Detail) $ in Thousands | Dec. 31, 2019 USD ($)
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Amortized Cost |
Mature in one year or less | $ 97,585
Mature after one year through two years | 13,514
Total amortized cost | 111,099
Estimated Fair Value |
Mature in one year or less | 97,662
Mature after one year through two years | 13,509
Total estimated fair value | $ 111,171

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