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Summary of Significant Accounting Policies - Property and Equipment (Details)	Jun. 30, 2025
Minimum [Member]
Summary of Significant Accounting Policies [Abstract]
Useful lives	5 years
Maximum [Member]
Summary of Significant Accounting Policies [Abstract]
Useful lives	7 years

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Balance Type:
Period Type: