Stockholders' Equity - 2017 Stock Incentive Plan (Details) - $ / shares |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 27, 2018 |
Dec. 28, 2017 |
Dec. 29, 2016 |
Sep. 14, 2018 |
May 29, 2018 |
Nov. 20, 2017 |
Jul. 25, 2017 |
May 02, 2017 |
Dec. 31, 2015 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||
| Number of options granted | 926,775 | 1,339,668 | 2,025,535 | ||||||
| Share price | $ 26.01 | $ 37.250 | $ 45.80 | $ 36.00 | $ 40.00 | $ 21.00 | |||
| 2011 Stock Option Plan | |||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||
| Shares of stock authorized under the plan | 12,520,407 | 10,780,970 | |||||||
| Shares available for grant | 179,575 | 104,269 | |||||||
| 2017 Plan | |||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||
| Shares of stock authorized under the plan | 5,000,000 | ||||||||
| Shares available for grant | 2,850,768 | 3,690,255 | |||||||
| Number of options granted | 1,254,465 | ||||||||
| Number of restricted shares granted | 15,475 | ||||||||
| Share price | $ 21.00 | ||||||||
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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 Net number of non-option equity instruments granted to participants. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
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- Details
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- Details
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