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Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Maturities of Marketable Securities Available-for-Sale (Detail) $ in Thousands	Sep. 30, 2019 USD ($)
Amortized Cost
Mature in one year or less	$ 117,130
Mature after one year through two years	20,482
Total amortized cost	137,612
Estimated Fair Value
Mature in one year or less	117,178
Mature after one year through two years	20,471
Total estimated fair value	$ 137,649

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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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