Stock-Based Payments - 2016 Stock Incentive Plan (Details) - 2016 Plan - shares |
12 Months Ended | |
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Jan. 01, 2017 |
Dec. 31, 2017 |
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| Stock-based payments | ||
| Increase in number of shares of common stock reserved for issuance of awards on the first day of each calendar year (in shares) | 1,600,000 | |
| Increase in number of shares of common stock reserved for issuance of awards on the first day of each calendar year, as a percentage of outstanding shares | 4.00% | |
| Increase in number of shares of common stock reserved for issuance (in shares) | 935,430 | |
| Common stock available for future issuance (in shares) | 2,880,493 | |
| Stock options | ||
| Stock-based payments | ||
| Vesting period | 4 years | |
| Term of award | 10 years | |
| Stock options | Vesting on one year anniversary of vesting commencement date | ||
| Stock-based payments | ||
| Vesting (as a percent) | 25.00% | |
| Stock options | Vesting ratably on a monthly basis | ||
| Stock-based payments | ||
| Vesting period | 3 years | |
| Vesting (as a percent) | 75.00% |
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- Definition Represents the additional shares that may be authorized for issuance annually under an established share-based compensation plan, expressed as a percentage of the entity's outstanding shares. No definition available.
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- Definition Represents the number of additional shares that may be authorized for issuance annually under an established share-based compensation plan. No definition available.
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- Definition Period 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, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. No definition available.
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Percentage of vesting of share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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