Litigation (Details) $ in Thousands							1 Months Ended
	Apr. 20, 2021 USD ($)	Apr. 19, 2021 USD ($)	Oct. 30, 2020 USD ($) Infringment Patent $ / Device	Sep. 25, 2020 Appeal	Mar. 23, 2020 USD ($)	Aug. 31, 2018 USD ($) $ / Device	Apr. 18, 2021	Mar. 31, 2021 USD ($)
McKool Smith P.C. v. VirnetX, Inc., AAA (Case No. 01-20-0003-7975) [Member]
Litigation [Abstract]
Amount of damages awarded in patent infringement case		$ 36,323
Contingency fee sought by plaintiff					$ 36,300
Contingency fee as percentage of payment					8.00%
Pre-judgment interest percentage							5.00%
Post-judgment interest percentage		5.00%
Contingency accrued amount								$ 38,284
Contingency accrued amount paid	$ 38,284
Positive Outcome of Litigation [Member] | VirnetX Inc. v. Apple, Inc. (Case 6:12-CV-00855-LED) ("Apple II") [Member]
Litigation [Abstract]
Amount of damages awarded in patent infringement case			$ 502,800			$ 502,600
Number of patents allegedly infringed upon by Apple, Inc. | Patent			2
Royalty rate per device used in calculating infringement damages | $ / Device						1.20
Damages awarded per accused device | $ / Device			0.84
Number of infringing units | Infringment			598,629,580
Number of appeals consolidated | Appeal				2