Effective date for stock options plan.

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- Definition

Stock based compensation expense expects to recognize in year four.

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No definition available.

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- Definition

stock-based compensation expense Expects to recognize in year one.

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Stock based compensation expense expects to recognize in year Three.

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No definition available.

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Stock based compensation expense expects to recognize in year two.

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No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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No definition available.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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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.

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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.

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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).

+ References

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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.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Name Accounting Standards Codification
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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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No definition available.

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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.

+ References

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Stock Options Plans and Stock Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	May. 20, 2015	Oct. 02, 2012	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013	May. 21, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Effective date for stock options plan	May 20, 2015
Share based compensation arrangement shares available for grant			2,484,296
Unamortized fair value stock options granted			$ 6.4
Weighted average fair value of each stock option granted			$ 13.21	$ 15.87	$ 11.17
Closing market value of stock			$ 35.40
Total intrinsic value of stock options exercised			$ 5.9	$ 10.5	$ 12.1
Weighted average exercise price, exercisable			$ 23.18
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit		$ 2.55	3.54
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit		$ 4.81	$ 43.35
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense for stock options and restricted stock units granted subsequent to initial S-1 filing			$ 10.7
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options			24.3	$ 20.1	$ 17.5
Stock-based compensation expense Expects to recognize in year one related to restricted stock units			9.7
Stock-based compensation expense Expects to recognize in year two related to restricted stock units			7.3
Stock-based compensation expense Expects to recognize in year three related to restricted stock units			5.2
Stock-based compensation expense Expects to recognize in year four related to restricted stock units			$ 2.1
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for options			4 years
Stock based compensation expense for stock options and restricted stock units granted subsequent to initial S-1 filing			$ 3.4
Weighted average remaining recognition period			2 years 10 months
Stock-based compensation expense Expects to recognize in year one related to restricted stock units			$ 2.6
Stock-based compensation expense Expects to recognize in year two related to restricted stock units			1.9
Stock-based compensation expense Expects to recognize in year three related to restricted stock units			1.3
Stock-based compensation expense Expects to recognize in year four related to restricted stock units			$ 0.6
Employee Stock Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum expiration period for options			10 years
Employee Stock Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum expiration period for options			5 years
Two Thousand Fifteen Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance in different forms						3,100,000
Share based compensation arrangement shares available for grant			2,484,296
Employee Termination [Member] \| Employee Stock Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum expiration period for options			90 days
Evolution Robotics, Inc. (ER) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		114,248