(10) Concentration of Credit Risk, Significant Customers and Geographic Information - Significant Customer (Details)	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017
Percent of Total Revenues Significant Customer
A	36.00%	28.00%
B	17.00%	14.00%
C	12.00%	9.00%

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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