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Equity Incentive Plans - Narrative (Details) - shares shares in Millions |  | 12 Months Ended
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Feb. 17, 2014 | Dec. 31, 2020
Equity Incentive Plans |  |
Common stock authorized for stock-based awards (in shares) |  | 110.8
Common stock reserved for further issuance (in shares) |  | 20.9
Stock options |  |
Equity Incentive Plans |  |
Vesting period of options granted |  | 3 years
Portion of awards vesting and unrestricting on second anniversary of grant date (as a percent) | 50.00% |
Portion of awards vesting and unrestricting on third and fourth anniversaries of grant date (as a percent) | 25.00% |
Expiration term for options |  | 10 years

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- Definition Represents the number of years after which granted options expire. + References No definition available. + Details
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- Definition The percentage of share-based awards that vest on the second anniversary of the grant date of the awards. + References No definition available. + Details
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- Definition The percentage of share-based awards that vest on the third and fourth anniversaries of the grant date of the awards. + References No definition available. + Details
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- Definition The period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, for awards granted prior to 2010. + References No definition available. + 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 shares authorized for issuance 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 (a)(3) -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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- Details
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