The percentage that the exercise price of outstanding awards was adjusted by due to Spin-off.

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Closing stock price of entity

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Potential Performance Based Restricted Stock Units To Be Issued Based On Shareholder Return

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Section 50
-Paragraph 2
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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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No definition available.

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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

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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.

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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).

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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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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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Stock-Based Compensation (Narratives) (Details) $ / shares in Units, $ in Millions		3 Months Ended	12 Months Ended
	Mar. 14, 2016	Apr. 01, 2016 USD ($)	Dec. 30, 2016 USD ($) $ / shares shares	Jan. 01, 2016 USD ($)	Jan. 02, 2015 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost \| $		$ 0.5
Adjusted exercise price percentage		93.00%
Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition			1 year 5 months
Tax benefit (expense) from compensation expense \| $			$ 2.3	$ 3.4	$ 2.3
Total unrecognized compensation cost \| $			4.6
Fair value of shares vested \| $			$ 11.8	$ 16.1	$ 12.5
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price \| $ / shares			$ 29.45
Unrecognized compensation cost related to non-vested stock options \| $			$ 1.4
Period for recognition			1 year 5 months
Award vesting period			3 years
Performance Shares [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance based restricted stock units to be issued based on shareholder return			0
Award vesting period			3 years
Performance Shares [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance based restricted stock units to be issued based on shareholder return			356,586
Nuvectra [Member] \| Spinoff [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock conversion ratio	3
Nuvectra [Member] \| Spinoff [Member] \| Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock conversion ratio	3
Nuvectra [Member] \| Spinoff [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock conversion ratio	3
2009 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized			1,350,000
Number of shares available for grant			65,910
2009 Plan [Member] \| Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized			200,000
Number of shares available for grant			10,261
2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized			1,350,000
Number of shares available for grant			120,676
2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized			1,450,000
Number of shares available for grant			1,316,690