Segment Information (Segment Results) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenue	$ 68,062	$ 65,802
Cost of revenue	16,465	17,226
Gross Profit	51,597	48,576
Operating expenses	56,621	75,640
Operating Income (Loss), Total	(5,024)	(27,064)
Consumer Media
Segment Reporting Information [Line Items]
Net revenue	12,581	13,170
Mobile Services
Segment Reporting Information [Line Items]
Net revenue	26,889	27,143
Games
Segment Reporting Information [Line Items]
Net revenue	28,592	25,489
Operating Segments | Consumer Media
Segment Reporting Information [Line Items]
Net revenue	12,581	13,170
Cost of revenue	2,273	3,031
Gross Profit	10,308	10,139
Operating expenses	8,889	11,186
Operating Income (Loss), Total	1,419	(1,047)
Operating Segments | Mobile Services
Segment Reporting Information [Line Items]
Net revenue	26,889	27,143
Cost of revenue	6,725	7,500
Gross Profit	20,164	19,643
Operating expenses	24,787	29,340
Operating Income (Loss), Total	(4,623)	(9,697)
Operating Segments | Games
Segment Reporting Information [Line Items]
Net revenue	28,592	25,489
Cost of revenue	7,451	6,975
Gross Profit	21,141	18,514
Operating expenses	19,936	20,220
Operating Income (Loss), Total	1,205	(1,706)
Corporate
Segment Reporting Information [Line Items]
Cost of revenue	16	(280)
Operating expenses	3,009	14,894
Operating Income (Loss), Total	$ (3,025)	$ (14,614)