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Stock Based Compensation	3 Months Ended
Stock Based Compensation	Mar. 31, 2018
Stock Based Compensation [Abstract]
Stock Based Compensation	Note 6 — Stock Based Compensation We have a stock incentive plan for employees and others called the “VirnetX Holding Corporation 2013 Equity Incentive Plan”, or the Plan, which has been approved by our stockholders. The Plan provides for the granting of up to 16,624,469 shares of our common stock, including stock options and stock purchase rights (“RSUs”), and will expire in 2024. As of March 31, 2018, 2,238,562 shares remained available for grant under the Plan. During the three months ending March 31, 2018, we granted options for a total of 670,000 shares with a weighted average grant date fair value of $2.61. During the three months ended March 31, 2018, we granted 20,000 RSU’s with an average grant date fair value of $4.05. Stock-based compensation expense included in general and administrative expense was $388 and $494, and in research and development expense was $498 and $339, for the three months ended March 31, 2018 and 2017, respectively. As of March 31, 2018, the unrecognized stock-based compensation expense related to non-vested stock options and RSUs was $7,179 and $1,614, respectively, which will be amortized over an estimated weighted average period of approximately 3.16 and 2.18 years, respectively.