XML 50 R35.htm IDEA: XBRL DOCUMENT
v3.19.1

Formation and Business of the Company (Details) - Patents [Member] | Dec. 31, 2018 Patent
--- | ---
Formation and Business of the Company Disclosure [Abstract] |
Number of patents and pending applications | 185
U.S. [Member] |
Formation and Business of the Company Disclosure [Abstract] |
Number of patents and pending applications | 70
Foreign [Member] |
Formation and Business of the Company Disclosure [Abstract] |
Number of patents and pending applications | 115

X
- References No definition available. + Details
Name: | vhc_FormationAndBusinessOfTheCompanyDisclosureAbstract
Namespace Prefix: | vhc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of patents and pending applications owned by the entity. + References No definition available. + Details
Name: | vhc_NumberOfPatentsAndPendingApplicationsOwned
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: |