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Revenues - Revenues Disaggregated by Significant Customer (Details) - Revenue - Customer Concentration Risk	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Affiliates of CVS Health Corporation
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	18.00%	15.00%
Affiliates of McKesson Corporation
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	15.00%	12.00%
Ipsen
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	13.00%	10.00%
Affiliates of AmerisourceBergen Corporation
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	11.00%	10.00%
Affiliates of Optum Specialty Pharmacy
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	12.00%	8.00%
Accredo Health, Incorporated
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	8.00%	10.00%

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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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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