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Revenues - Activities and Ending Reserve Balances for Significant Categories of Discounts and Allowances (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Jan. 01, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | $ 30,536 | $ 26,233
Provision related to sales made in: |  |
Current period | 374,208 | 220,748
Prior periods | 1,449 | 293
Payments and customer credits issued | (357,868) | (216,738)
Balance at end of period | 48,325 | 30,536
Chargebacks, Discounts for Prompt Payment and Other |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | 9,853 | 7,514
Provision related to sales made in: |  |
Current period | 243,119 | 146,537
Prior periods | (64) | 33
Payments and customer credits issued | (238,283) | (144,231)
Balance at end of period | 14,625 | 9,853
Other Customer Credits/Fees and Co-pay Assistance |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | 3,279 | 3,497
Provision related to sales made in: |  |
Current period | 30,728 | 16,162
Prior periods | (111) | (352)
Payments and customer credits issued | (25,021) | (16,028)
Balance at end of period | 8,875 | 3,279
Rebates |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | 17,404 | 15,222
Provision related to sales made in: |  |
Current period | 100,361 | 58,049
Prior periods | 1,624 | 612
Payments and customer credits issued | (94,564) | (56,479)
Balance at end of period | $ 24,825 | $ 17,404

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