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Stock-based Compensation - Additional Information (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 28, 2020 | Jun. 30, 2020 | Feb. 29, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2015 | Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized stock-based compensation expense |  |  |  | $ 15,400,000 | $ 1,300,000 |  |  |
Unrecognized stock-based compensation weighted-average period |  |  |  | 1 year 9 months 18 days | 2 years 4 months 24 days |  |  |
Weighted average fair value per share |  |  |  | $ 3.97 |  |  |  |
Aggregate intrinsic value of options exercised |  |  |  | $ 22,400,000 |  |  |  |
Aggregate intrinsic value of options outstanding |  |  |  | 205,700,000 |  |  |  |
Aggregate intrinsic value of options exercisable |  |  |  | $ 128,100,000 |  |  |  |
Granted, Shares |  |  |  | 2,073,006 |  |  |  |
Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 2,200,000 | $ 2,600,000 | $ 1,000,000 |  |
Unrecognized stock-based compensation expense |  |  |  | $ 3,500,000 | $ 5,200,000 |  |  |
Unrecognized stock-based compensation weighted-average period |  |  |  | 2 years 2 months 12 days | 2 years 7 months 6 days |  |  |
Restricted Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 10,900,000 | $ 100,000 | 100,000 |  |
Award acceleration period |  |  |  | 12 months |  |  |  |
Restricted Stock Units | Chief Executive Officer |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted, Shares |  |  | 367,782 |  |  |  |  |
Restricted Stock Units | Service Periods Vest Ranging from 12 to 48 Months | IPO |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation expense |  | $ 510,278,000 |  |  |  |  |  |
RSAs |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares available for future issuance |  |  |  |  |  |  | 4,751,874 | 4,751,874
Stock-based compensation expense |  |  |  | $ 200,000 | $ 0 | $ 100,000 |  |
Unrecognized stock-based compensation expense |  |  |  | $ 0 |  |  |  |
Maximum | Restricted Stock Units | Service Periods Vest Ranging from 12 to 48 Months | IPO |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Continuous service period |  | 48 months |  |  |  |  |  |
Minimum [Member] | Restricted Stock Units | Service Periods Vest Ranging from 12 to 48 Months | IPO |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Continuous service period |  | 12 months |  |  |  |  |  |
2020 Incentive Award Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares available for future issuance |  |  |  | 3,185,964 |  |  |  |
2020 Incentive Award Plan | Maximum |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares authorized for issuance | 3,019,108 |  |  |  |  |  |  |
Percentage annual increase in shares available for issuance as award in each year beginning | 4.00% |  |  |  |  |  |  |

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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. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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