CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Royalty Revenue
Amortization of capitalized fees paid to a related party	$ 3,456	$ 3,456	$ 6,912	$ 6,912

Represents the amortization of capitalized fees paid to a related party.

No definition available.

Name:	inva_AmortizationOfCapitalizedFeesPaidToRelatedParty
Namespace Prefix:	inva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration