Commitments and Contingencies - Narrative (Details)			1 Months Ended
	Apr. 09, 2020 patent	Sep. 05, 2018 patent	May 06, 2021 patent	Mar. 31, 2021 inter_partes_review
Contingencies [Line Items]
Number of IPR requests denied | inter_partes_review				7
Number of IPR requests granted | inter_partes_review				4
Roku Lawsuit
Contingencies [Line Items]
Number of patents allegedly infringed upon		9
Roku Lawsuit | Pending litigation
Contingencies [Line Items]
Number of patents allegedly infringed upon		9
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
Roku- ITC Matter | Pending litigation | Subsequent Event
Contingencies [Line Items]
Number of patents allegedly infringed upon			2