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Revenues - Revenues Disaggregated by Significant Customer (Details) - Customer Concentration Risk | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 02, 2021 | Jul. 03, 2020 | Jul. 02, 2021 | Jul. 03, 2020 | Jan. 01, 2021
Ipsen Pharma SAS | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 24.00% | 20.00% | 19.00% | 17.00% |
Ipsen Pharma SAS | Accounts Receivable |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues |  |  | 24.00% |  | 23.00%
Affiliates of McKesson Corporation | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 14.00% | 11.00% | 14.00% | 13.00% |
Affiliates of McKesson Corporation | Accounts Receivable |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues |  |  | 21.00% |  | 12.00%
Affiliates of CVS Health Corporation | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 13.00% | 13.00% | 14.00% | 15.00% |
Affiliates of CVS Health Corporation | Accounts Receivable |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues |  |  | 13.00% |  | 11.00%
Affiliates of AmerisourceBergen Corporation | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 12.00% | 11.00% | 13.00% | 11.00% |
Affiliates of AmerisourceBergen Corporation | Accounts Receivable |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues |  |  | 19.00% |  | 11.00%
Affiliates of Optum Specialty Pharmacy | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 8.00% | 10.00% | 9.00% | 11.00% |
Accredo Health, Incorporated | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 8.00% | 10.00% | 8.00% | 9.00% |
Takeda Pharmaceutical Company Limited | Revenue |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 2.00% | 10.00% | 2.00% | 5.00% |
Takeda Pharmaceutical Company Limited | Accounts Receivable |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues |  |  | 4.00% |  | 10.00%

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