XML 75 R54.htm IDEA: XBRL DOCUMENT v3.3.1.900

Income Taxes - Summary of Income Tax Examinations (Detail)	12 Months Ended
	Dec. 31, 2015
Australia [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2005
Austria [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2008
Belgium [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2008
Canada [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2011
Netherlands [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2009
Singapore [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2007
Switzerland [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2013
United States [Member]
Open Tax Years By Major Jurisdiction [Line Items]
Earliest tax year subject to audit	2005

X

- Definition

Income tax examination earliest year for which tax returns subject to being audited, in CCYY format.

+ References

No definition available.

+ Details

Name:	vdsi_IncomeTaxExaminationEarliestYearTaxReturnsSubjectToBeingAudited
Namespace Prefix:	vdsi_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Open Tax Years By Major Jurisdiction [Line Items]

+ References

No definition available.

+ Details

Name:	vdsi_OpenTaxYearsByMajorJurisdictionLineItems
Namespace Prefix:	vdsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_AU
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=vdsi_AustriaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_BE
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_NL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_SG
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_CH
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: