GENERAL (Details)	Jun. 30, 2018 item
GENERAL
Number of therapeutic candidates out-licensed on an exclusive world-wide basis	1

The number of therapeutic candidates the entity has out-licensed on an exclusive world-wide basis.

No definition available.

Name:	rdhl_NumberOfTherapeuticCandidatesOutLicensedOnWorldWideExclusiveBasis
Namespace Prefix:	rdhl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant