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Litigation (Details) - Positive Outcome of Litigation [Member] $ in Thousands	Sep. 30, 2016 USD ($) Patent	Jul. 29, 2016 Case	Feb. 04, 2016 USD ($) Patent	Mar. 30, 2015 Action	Feb. 26, 2013 USD ($)	Nov. 06, 2012 USD ($) Patent	Mar. 31, 2017 Lawsuit
Gain Contingencies [Line Items]
Number of intellectual property infringement lawsuits pending | Lawsuit							9
VirnetX Inc. v. Apple, Inc. (Case 6:12-CV-00855-LED) [Member]
Gain Contingencies [Line Items]
Number of civil actions consolidated by court | Action				2
Amount of damages awarded in patent infringement case			$ 625,600
Number of patents allegedly infringed upon by Apple, Inc. | Patent			4
Number of cases ordered to be retried by court | Case		2
VirnetX Inc. v. Cisco Systems, Inc. et al. (Case 6:10-CV-00417-LED) ("Apple I") [Member]
Gain Contingencies [Line Items]
Number of civil actions consolidated by court | Action				2
Amount of damages awarded in patent infringement case	$ 302,400					$ 368,000
Number of patents allegedly infringed upon by Apple, Inc. | Patent	4					4
Number of cases ordered to be retried by court | Case		2
Amount of interest payment awarded up to final judgment, per day					$ 34
Amount of damage infringement payment awarded up to final judgment, per day					$ 330
VirnetX Inc. v. Apple, Inc. (Case 6:12-CV-00855-LED) ("Apple II") [Member]
Gain Contingencies [Line Items]
Number of civil actions consolidated by court | Action				2
Number of patents allegedly infringed upon by Apple, Inc. | Patent						4
Number of cases ordered to be retried by court | Case		2

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Amount of damages awarded to the plaintiff in the legal matter.

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For an amount of damages awarded to the plaintiff in the legal matter, the daily interest payment awarded the plaintiff up to final payment of awarded damages.

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For an amount of damages awarded to the plaintiff in the legal matter, the daily payments awarded for damage infringement to the plaintiff up to final payment of awarded damages.

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