Commitments and Contingencies - Litigation (Details) - Pending Litigation			1 Months Ended
	Sep. 05, 2018 patent	Jun. 10, 2015 product subsidiary patent customer	Sep. 30, 2015 patent
UEBV Lawsuit
Contingencies [Line Items]
Number of subsidiaries named in lawsuit | subsidiary		1
Number of customers named in lawsuit | customer		1
UEBV Lawsuit | Design Patents
Contingencies [Line Items]
Number of products named in lawsuit | product		1
Number of patents allegedly infringed upon		2
UEBV Lawsuit | Utility Patents
Contingencies [Line Items]
Number of patents allegedly infringed upon		1	1
Roku Lawsuit | Utility Patents
Contingencies [Line Items]
Number of patents allegedly infringed upon	9