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Stock Plan (Details) (USD $)	Apr. 13, 2012	Mar. 31, 2012	Dec. 31, 2011
VirnetX Holding Corporation 2007 Stock Plan [Line Items]
Number of shares authorized (in shares)		11,624,469
Shares available for grant (in shares)		628,478
Stock Options [Member]
VirnetX Holding Corporation 2007 Stock Plan [Line Items]
Number of shares authorized (in shares)	240,000
Stock options outstanding (in shares)		4,828,998	4,906,998
Average exercise price (in dollars per share)		$ 5.20	$ 5.12

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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