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Segment and Geographic Information (Significant Customers) (Details) - customer	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Revenue, Major Customer [Line Items]
Number of Customers	4
Entity-Wide Revenue, Major Customer, Percentage	52.00%	53.00%	57.00%
Entity Wide Accounts Receivable, Major Customer, Percentage	49.00%	52.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Number of Customers	4	4	4
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	21.00%	22.00%	24.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	19.00%	20.00%	21.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.00%	11.00%	12.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Number of Customers	4	4
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	11.00%	11.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	18.00%	21.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Entity Wide Accounts Receivable, Major Customer, Percentage	20.00%	20.00%
Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	22.00%
Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	19.00%
Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.00%
Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	0.00%
Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | All Other Customers [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	47.00%
Non-Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	0.00%
Non-Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	0.00%
Non-Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	0.00%
Non-Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	28.00%
Non-Medical Segment [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer [Member] | All Other Customers [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	72.00%

X

- Definition

Concentration Risk, Number of Customers

+ References

No definition available.

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- Definition

Percentage of trade receivables outstanding to a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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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.

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No definition available.

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