Business Overview (Details)	6 Months Ended
Jun. 30, 2018 product
Business Overview
Novel compounds in development (number)	2

Represents the number of novel anti-HBV compounds in developing process.

No definition available.

Name:	ctrv_NumberOfNovelAntiHbvCompoundsInDevelopingProcess
Namespace Prefix:	ctrv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration