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Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Maturities of Marketable Securities Available-for-Sale (Detail) $ in Thousands | Mar. 31, 2021 USD ($)
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Amortized Cost |
Mature in one year or less | $ 137,849
Mature after one year through two years | 15,748
Total amortized cost | 153,597
Estimated Fair Value |
Mature in one year or less | 137,877
Mature after one year through two years | 15,742
Total estimated fair value | $ 153,619

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