Share-Based Compensation - Summary of Activity of Option Plans (Details) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding Option Shares, Beginning Balance	8,919,116	7,763,464
Option, Granted	4,011,728	2,647,236
Option, Exercised	(1,411,188)	(940,940)
Option, Forfeited/cancelled	(975,386)	(550,644)
Outstanding Option Shares, Ending Balance	10,544,270	8,919,116
Weighted-Average Exercise Price Outstanding at Beginning Balance	$ 7.02	$ 5.00
Weighted-Average Exercise Price, Granted	7.26	11.64
Weighted-Average Exercise Price, Exercised	0.49	1.34
Weighted-Average Exercise Price, Forfeited/canceled	8.17	10.47
Weighted-Average Exercise Price Outstanding at Ending Balance	$ 7.88	$ 7.02

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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