Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 02, 2018	Jan. 03, 2017
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ (35,811)	$ (27,353)
Increase in equity if realized	8,600
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 106,700	$ 60,500

Operating Loss Carryforwards, Increase in Equity if Realized

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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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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