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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
CONSOLIDATED STATEMENTS OF OPERATIONS |  |  |
Amortization of capitalized fees paid to a related party | $ 13,823 | $ 13,823 | $ 13,823

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- Definition Represents the amortization of capitalized fees paid to a related party. + References No definition available. + Details
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Namespace Prefix: | inva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_IncomeStatementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration