Share-Based Compensation - Summary (Details) - shares	1 Months Ended	12 Months Ended
Jul. 31, 2018	Dec. 31, 2019
2015 Plan and the 2018 Plan \| Stock Options
Share-Based Compensation
Required Service period (in years)		4 years
Annual vesting percentage		25.00%
Restricted period of holding after exercise (in years)		3 years
Additional implicit service period (in years)		3 years
Vesting period (in years)		7 years
2015 Plan \| Stock Options
Share-Based Compensation
Number of shares authorized		581,972,860
Term of the options (in years)		10 years
2018 Plan \| RSU
Share-Based Compensation
Number of shares authorized	363,130,400
Term of the options (in years)		4 years
Percentage of annual increase on shares issued	1.00%
Annual vesting percentage		25.00%
Vesting percentage on 2nd anniversary of the grant date		50.00%
Vesting percentage on 3rd and 4th anniversary of the grant date		25.00%

Represents the additional implicit service period.

No definition available.

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- Definition

Represents the restricted period of holding after exercise.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of stock awards vesting each year.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of stock awards vesting in third and forth year of grand date.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of stock awards vesting in second year of grand date.

+ References

No definition available.

+ Details

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- Definition

Percentage of annual increase of shares that may be issued in accordance with the plan of the total number of shares issued and outstanding on the last day of the immediately preceding fiscal year.

+ References

No definition available.

+ Details

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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