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Stock-Based Compensation - (RSU) - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) installment shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting equal installments | installment	36
Restricted Stock Units (RSU)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting equal installments | installment	4
Unrecognized compensation expenses related to unvested RSUs | $	$ 25.9
Unrecognized compensation expenses, weighted average period	2 years
Grant date fair value of common stock granted (in shares) | shares	498,505
Grant date fair value of common stock vested | $	$ 8.3

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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