XML 65 R40.htm IDEA: XBRL DOCUMENT
v3.20.4

Revenues (Activities and Ending Reserve Balances for Significant Categories of Discounts and Allowances) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 01, 2021 | Jan. 03, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | $ 26,233 | $ 17,276
Provision related to sales made in: |  |
Current period | 220,748 | 193,791
Prior periods | 293 | 3,880
Payments and customer credits issued | (216,738) | (188,714)
Balance at end of period | 30,536 | 26,233
Chargebacks, Discounts for Prompt Payment and Other |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | 7,514 | 2,322
Provision related to sales made in: |  |
Current period | 146,537 | 129,936
Prior periods | 33 | 3,989
Payments and customer credits issued | (144,231) | (128,733)
Balance at end of period | 9,853 | 7,514
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 | 3,497 | 3,038
Provision related to sales made in: |  |
Current period | 16,162 | 15,605
Prior periods | (352) | (111)
Payments and customer credits issued | (16,028) | (15,035)
Balance at end of period | 3,279 | 3,497
Rebates |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Balance at beginning of period | 15,222 | 11,916
Provision related to sales made in: |  |
Current period | 58,049 | 48,250
Prior periods | 612 | 2
Payments and customer credits issued | (56,479) | (44,946)
Balance at end of period | $ 17,404 | $ 15,222

X
- Definition Valuation Allowances And Reserves, Additions For Sales In Current Period + References No definition available. + Details
Name: | exel_ValuationAllowancesAndReservesAdditionsForSalesInCurrentPeriod
Namespace Prefix: | exel_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Valuation Allowances And Reserves, Additions For Sales In Prior Period + References No definition available. + Details
Name: | exel_ValuationAllowancesAndReservesAdditionsForSalesInPriorPeriod
Namespace Prefix: | exel_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Valuation Allowances And Reserves, Additions To Provision [Abstract] + References No definition available. + Details
Name: | exel_ValuationAllowancesAndReservesAdditionsToProvisionAbstract
Namespace Prefix: | exel_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_MovementInValuationAllowancesAndReservesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesDeductions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=exel_ChargebacksAndDiscountsForPromptPaymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=exel_AllowanceForCustomerCreditsFeesandCoPayAssistanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=exel_AllowanceForProductRebatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |