Stock-Based Compensation - Schedule of Weighted-Average Assumptions Used as Inputs to Black-Scholes Option Pricing Model (Detail) - $ / shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Weighted average grant date fair value	$ 3.77	$ 6.93	$ 8.06
Expected dividend yield	0.00%	0.00%	0.00%
Expected stock price volatility	68.00%	67.00%	64.00%
Risk-free interest rate	1.29%	0.91%	2.60%
Expected life of options (in years)	6 years 2 months 12 days	6 years 2 months 12 days	6 years 3 months 18 days

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Expected term of 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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-Name Accounting Standards Codification
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