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Concentrations of Risk (Details)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Percent of Gross Accounts Receivable | Credit concentration risk | Company A
Concentration Risk [Line Items]
Concentrations of risk, percentage	22.00%
Percent of Gross Accounts Receivable | Credit concentration risk | Company E
Concentration Risk [Line Items]
Concentrations of risk, percentage		12.00%
Percent of Gross Accounts Receivable | Credit concentration risk | Company B
Concentration Risk [Line Items]
Concentrations of risk, percentage	12.00%
Percent of Gross Accounts Receivable | Credit concentration risk | Company C
Concentration Risk [Line Items]
Concentrations of risk, percentage	12.00%
Percent of Gross Accounts Receivable | Credit concentration risk | Company D
Concentration Risk [Line Items]
Concentrations of risk, percentage		37.00%
Sales as a Percent of Total Revenue | Customer concentration risk | Company F [Member]
Concentration Risk [Line Items]
Concentrations of risk, percentage			10.00%
Sales as a Percent of Total Revenue | Customer concentration risk | Company A
Concentration Risk [Line Items]
Concentrations of risk, percentage	18.00%	12.00%	15.00%
Sales as a Percent of Total Revenue | Customer concentration risk | Military Customers in Total
Concentration Risk [Line Items]
Concentrations of risk, percentage	38.00%	57.00%	60.00%
Sales as a Percent of Total Revenue | Customer concentration risk | Company E
Concentration Risk [Line Items]
Concentrations of risk, percentage		21.00%	18.00%
Sales as a Percent of Total Revenue | Customer concentration risk | Company D
Concentration Risk [Line Items]
Concentrations of risk, percentage	13.00%	22.00%	23.00%
Sales as a Percent of Total Revenue | United States Government Funded Research and Development Contracts
Concentration Risk [Line Items]
Concentrations of risk, percentage	7.00%	10.00%	8.00%

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- 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=7491637&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=7491637&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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