General (Details Textual)	Dec. 31, 2020 subsidiary
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Subsidiary or equity method investee, number	12

Represents the number of subsidiaries of equity method investees.

No definition available.

Name:	vrns_SubsidiaryOrEquityMethodInvesteeNumber
Namespace Prefix:	vrns_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant