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Equity-Based Compensation - 2017 and 2018 Plan (Details) |  | 12 Months Ended
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May 11, 2018 shares | Dec. 31, 2020 item shares | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Number of share-based compensation plans | item |  | 3 |
2018 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Unused shares available to be granted (in shares) |  | 1,962,992 |
Increase as percentage of outstanding shares | 4.00% |  |
Vesting period | 4 years |  |
2017 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Additional shares authorized under stock-based plans (in shares) | 0 |  |
Vesting period |  |  | 4 years

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- Definition Increase in share reserved and available for issuance, as percentage of outstanding shares of common stock. + References No definition available. + 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=120381028&loc=d3e5070-113901 + Details
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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. + Details
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- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + 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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