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Concentration of Credit Risk (Details) (Customer Concentration Risk [Member])	12 Months Ended
	Jan. 03, 2015 customer	Dec. 28, 2013 customer	Dec. 29, 2012 customer
Concentration Risk [Line Items]
Number Of Customers Accounted For More Than 10 Percent Of Entity's Net Sales	0dar_NumberOfCustomersAccountedForMoreThan10PercentOfEntitysNetSales	0dar_NumberOfCustomersAccountedForMoreThan10PercentOfEntitysNetSales	0dar_NumberOfCustomersAccountedForMoreThan10PercentOfEntitysNetSales
Maximum [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Number Of Customers Accounted For More Than 10 Percent Of Entity's Net Sales

+ References

No definition available.

+ Details

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- Details

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X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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- Details

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