Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 43,145	$ 39,472
Consumer Media
Disaggregation of Revenue [Line Items]
Revenue	3,495	2,486
Consumer Media | Business to Business
Disaggregation of Revenue [Line Items]
Revenue	2,343	1,178
Consumer Media | Direct to Consumer
Disaggregation of Revenue [Line Items]
Revenue	1,152	1,308
Consumer Media | Software License
Disaggregation of Revenue [Line Items]
Revenue	2,020	735
Consumer Media | Subscription Services
Disaggregation of Revenue [Line Items]
Revenue	929	1,088
Consumer Media | Product Sales
Disaggregation of Revenue [Line Items]
Revenue	222	219
Consumer Media | Advertising and Other
Disaggregation of Revenue [Line Items]
Revenue	324	444
Mobile Services
Disaggregation of Revenue [Line Items]
Revenue	6,690	6,939
Mobile Services | Business to Business
Disaggregation of Revenue [Line Items]
Revenue	6,584	6,817
Mobile Services | Direct to Consumer
Disaggregation of Revenue [Line Items]
Revenue	106	122
Mobile Services | Software License
Disaggregation of Revenue [Line Items]
Revenue	831	599
Mobile Services | Subscription Services
Disaggregation of Revenue [Line Items]
Revenue	5,859	6,340
Mobile Services | Product Sales
Disaggregation of Revenue [Line Items]
Revenue	0	0
Mobile Services | Advertising and Other
Disaggregation of Revenue [Line Items]
Revenue	0	0
Games
Disaggregation of Revenue [Line Items]
Revenue	6,637	5,710
Games | Business to Business
Disaggregation of Revenue [Line Items]
Revenue	1,095	1,036
Games | Direct to Consumer
Disaggregation of Revenue [Line Items]
Revenue	5,542	4,674
Games | Software License
Disaggregation of Revenue [Line Items]
Revenue	0	0
Games | Subscription Services
Disaggregation of Revenue [Line Items]
Revenue	2,770	2,985
Games | Product Sales
Disaggregation of Revenue [Line Items]
Revenue	2,978	1,988
Games | Advertising and Other
Disaggregation of Revenue [Line Items]
Revenue	889	737
Napster
Disaggregation of Revenue [Line Items]
Revenue	26,323	24,337
Napster | Business to Business
Disaggregation of Revenue [Line Items]
Revenue	12,851	12,095
Napster | Direct to Consumer
Disaggregation of Revenue [Line Items]
Revenue	13,472	12,242
Napster | Software License
Disaggregation of Revenue [Line Items]
Revenue	0	0
Napster | Subscription Services
Disaggregation of Revenue [Line Items]
Revenue	26,323	24,337
Napster | Product Sales
Disaggregation of Revenue [Line Items]
Revenue	0	0
Napster | Advertising and Other
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 0