XML 29 R17.htm IDEA: XBRL DOCUMENT v3.7.0.1

Business Description and Basis of Presentation (Details)	Mar. 31, 2017 Patent
Finite-Lived Intangible Assets [Line Items]
Number of pending patent applications	50
Patents [Member] | U.S. [Member]
Finite-Lived Intangible Assets [Line Items]
Number of patents owned	49
Patents [Member] | Foreign [Member]
Finite-Lived Intangible Assets [Line Items]
Number of patents owned	69

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents number of patents owned.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the number of pending patents applications.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_GeographicDistributionAxis=us-gaap_NonUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: