| Document and Entity Information | Nov. 19, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 19, 2021 |
| Entity Registrant Name | VirnetX Holding Corporation |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-33852 |
| Entity Tax Identification Number | 77-0390628 |
| Entity Address, Address Line One | 308 Dorla Court |
| Entity Address, Address Line Two | Suite 206 |
| Entity Address, City or Town | Zephyr Cove |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89448 |
| City Area Code | 775 |
| Local Phone Number | 548-1785 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001082324 |
| Title of 12(b) Security | Common Stock, par value $0.0001 |
| Trading Symbol | VHC |
| Security Exchange Name | NYSE |
