Segment Information (Revenue by Geographic Region) (Detail) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	[1]	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	[1]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 29,922	$ 30,823	$ 33,954	$ 30,597		$ 35,506	$ 34,157	$ 40,825	$ 45,724		$ 125,296	[2]	$ 156,212	[2]	$ 206,196	[2]
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue											46,893		61,660		90,250
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue											15,166		26,575		38,155
Republic of Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue											37,832		39,852		46,601
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue											$ 25,405		$ 28,125		$ 31,190

[1] In the quarter ended March 31, 2014, certain accrued royalty liabilities of $10.6 million associated with our historical music business, which had originally been recorded based on statutory rates, were extinguished.

[2] December 31, 2013 December 31, 2012 December 31, 2011Components of Revenue License Fees28,422 28,308 43,709Service Revenue96,874 127,904 162,487Net Revenue125,296 156,212 206,196