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Stock-Based Compensation - Narrative (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2021 USD ($) shares
Share-Based Compensation [Line Items] |
Unrecognized stock-based compensation expense related to stock options | $ | $ 3.4
Options and RSUs | Non-employee director |
Share-Based Compensation [Line Items] |
Service period for award vesting (in years) | 1 year
Stock options |
Share-Based Compensation [Line Items] |
Service period for award vesting (in years) | 4 years
Weighted-average period for recognition of stock-based compensation expense (in years) | 2 years 1 month 6 days
Stock options | Awards granted after December 5, 2012 |
Share-Based Compensation [Line Items] |
Award expiration period (in years) | 8 years
Stock options | Awards granted prior to December 5, 2012 |
Share-Based Compensation [Line Items] |
Award expiration period (in years) | 10 years
RSUs |
Share-Based Compensation [Line Items] |
Service period for award vesting (in years) | 4 years
Unrecognized stock-based compensation expense related to RSUs | $ | $ 74.5
Weighted-average period for recognition of stock-based compensation expense (in years) | 2 years 6 months
2017 Plan |
Share-Based Compensation [Line Items] |
Shares available for grant | 3,600,000
2012 Purchase Plan |
Share-Based Compensation [Line Items] |
Number of shares authorized | 2,000,000.0
Shares available for issuance under the Plan | 100,000

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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + 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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