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Revenues - Revenues Disaggregated by Significant Customer (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2018 | Mar. 30, 2018 | Jun. 30, 2017 | Jun. 29, 2018 | Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 186,108 | $ 213,700 | $ 99,008 | $ 399,827 | $ 179,895
Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 100.00% |  | 100.00% | 100.00% | 100.00%
Ipsen |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 34,043 |  | $ 5,494 | $ 87,852 | $ 10,024
Ipsen | Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 18.00% |  | 6.00% | 22.00% | 6.00%
Caremark L.L.C. |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 26,421 |  | $ 18,435 | $ 52,809 | $ 32,254
Caremark L.L.C. | Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 14.00% |  | 19.00% | 13.00% | 18.00%
Affiliates of McKesson Corporation |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 23,321 |  | $ 12,846 | $ 44,652 | $ 24,124
Affiliates of McKesson Corporation | Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 13.00% |  | 13.00% | 11.00% | 13.00%
Diplomat Specialty Pharmacy |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 18,475 |  | $ 22,599 | $ 38,622 | $ 42,449
Diplomat Specialty Pharmacy | Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 10.00% |  | 23.00% | 10.00% | 24.00%
Accredo Health, Incorporated |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 19,714 |  | $ 13,619 | $ 38,000 | $ 23,059
Accredo Health, Incorporated | Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 11.00% |  | 14.00% | 10.00% | 13.00%
Others, individually less than 10% of Total revenues for all periods presented |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Total revenues | $ 64,134 |  | $ 26,015 | $ 137,892 | $ 47,985
Others, individually less than 10% of Total revenues for all periods presented | Revenue | Customer Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percent of total revenues | 34.00% |  | 25.00% | 34.00% | 26.00%

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