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Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2021 USD ($) $ / shares
Options to purchase common stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options, expired (in dollars per share) | $ / shares | $ 15.36
Total unrecognized compensation costs | $ 38.7
Unrecognized compensation costs, period for recognition (in years) | 3 years
Unvested restricted stock units | Stock Option Plan Amended Restated 2007 Equity Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized compensation costs | $ 64.5
Unrecognized compensation costs, period for recognition (in years) | 3 years

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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 Amount of cost to be recognized for option 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 (i) -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 Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. + References No definition available. + Details
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