Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	$ 496
Costs incurred and charged to expense	239
Cash payments	(515)
Accrued liability ending balance	220
Napster
Restructuring Reserve [Roll Forward]
Costs incurred and charged to expense	100
Employee Separation Costs
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	209	$ 167
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	322
Costs incurred and charged to expense	239
Cash payments	(341)
Accrued liability ending balance	220
Asset Related and Other Costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	174
Costs incurred and charged to expense	0
Cash payments	(174)
Accrued liability ending balance	$ 0