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Stockholders' Equity - Additional Information (Details) shares in Millions, $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) Plan shares | Dec. 31, 2019 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Number of share-based employee compensation plans | Plan | 3 |
Pre-2017 Awards |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Unrecognized compensation cost | $ 6.6 |
Weighted average recognition period | 4 months 24 days |
Post-2017 Awards |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Unrecognized compensation cost | $ 1,700.0 |
Weighted average recognition period | 2 years 10 months 24 days |
Service condition satisfied, years | 4 years |
Post-2017 Awards | First Year |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Award vesting percentage | 10.00% |
Post-2017 Awards | Second Year |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Award vesting percentage | 20.00% |
Post-2017 Awards | Third Year |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Award vesting percentage | 30.00% |
Post-2017 Awards | Fourth Year |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Award vesting percentage | 40.00% |
RSUs |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
RSUs vested but not yet settled | shares | 4.0 | 9.4
Stock Options |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Weighted average recognition period | 1 year 9 months 18 days |
Unrecognized compensation cost | $ 11.1 |

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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=116856206&loc=d3e5070-113901 + Details
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