Represents the percentage of stock awards vesting each year.

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)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Period Type:	duration

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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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

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

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Stock-Based Compensation - Non-Employee Director Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended		9 Months Ended
	Sep. 28, 2017	Jun. 16, 2017	Mar. 08, 2017	Sep. 28, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock-Based Compensation
Stock-based compensation expense (in dollars)					$ 939	$ 223	$ 7,776	$ 481
Restricted stock \| Non-employee directors
Stock-Based Compensation
Stock-based compensation expense (in dollars)					56	$ 1	165	$ 1
Unrecognized compensation expense (in dollars)					$ 276		$ 276
Restricted stock \| Non-employee directors \| Award Date of September 28, 2016
Stock-Based Compensation
Awards, other than options, granted (in shares)				22,260
Share price (in dollars per share)				$ 12.00
Restricted stock \| Non-employee directors \| Award Date of March 8, 2017
Stock-Based Compensation
Awards, other than options, granted (in shares)			5,212
Annual vesting (as a percent)			33.33%
Vesting period			3 years
Share price (in dollars per share)			$ 13.68
Restricted Stock, Annual grant \| Non-employee directors \| Award Date of September 28, 2016
Stock-Based Compensation
Vested (in shares)		7,420
Restricted Stock, Annual grant \| Non-employee directors \| Award Date June 16, 2017
Stock-Based Compensation
Awards, other than options, granted (in shares)		10,384
Share price (in dollars per share)		$ 13.54
Restricted Stock, Annual grant \| Maximum \| Non-employee directors \| Award Date of September 28, 2016
Stock-Based Compensation
Vesting period				1 year
Restricted Stock, Annual grant \| Maximum \| Non-employee directors \| Award Date June 16, 2017
Stock-Based Compensation
Vesting period		1 year
Restricted Stock, Initial grant \| Non-employee directors \| Award Date of September 28, 2016
Stock-Based Compensation
Annual vesting (as a percent)				33.33%
Vesting period				3 years
Vested (in shares)	4,944