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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%

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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 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 + Details
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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 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 + Details
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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 + Details
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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 + Details
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