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Litigation (Details)	Mar. 31, 2012 Integer
Litigation [Abstract]
Number of intellectual property infringement lawsuits pending	3
Number of unfair trade practices complaints filed	1

X

- Definition

The total amount of pending claims pertaining to a loss contingency accrual as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	vhc_LitigationAbstract
Namespace Prefix:	vhc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of complaints filed with the United States International Trade Commission.

+ References

No definition available.

+ Details

Name:	vhc_NumberOfUnfairTradePracticesComplaintsFiled
Namespace Prefix:	vhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant