XML 97 R78.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Net Income (Loss) Per Share - Narrative (Details) | Dec. 31, 2016 shares
--- | ---
2014 Warrants [Member] |
Class of Warrant or Right [Line Items] |
Warrants outstanding (in shares) | 1,000,000

X
- 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
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=exel_WarrantsIssuedOnJanuaryTwentySecondTwoThousandAndFourteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |