Commitments and Contingencies - Litigation (Details)			2 Months Ended
	Apr. 09, 2020 patent	Sep. 05, 2018 patent	Jun. 30, 2020 inter_partes_review patent	Dec. 31, 2020 inter_partes_review
Contingencies [Line Items]
Number of IPR requests denied | inter_partes_review				3
Number of IPR requests granted | inter_partes_review				6
Number of IPR requests | inter_partes_review			4
Number of patents subject to IPR requests			3
Number of additional IPR requests | inter_partes_review			1
Roku lawsuit
Contingencies [Line Items]
Number of patents allegedly infringed upon		9
Roku lawsuit | Pending litigation
Contingencies [Line Items]
Number of patent families		4
Roku, TCL, Hisense, and Funai Patent Infringement - ITC Matter | Pending litigation
Contingencies [Line Items]
Number of patents allegedly infringed upon	5
TLC Hisense and Funai - ITC Matter | Pending litigation
Contingencies [Line Items]
Number of patents allegedly infringed upon	6