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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 ($)
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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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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