Segment Information (Segment Results) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue	[1]	$ 17,579	$ 18,557	$ 52,953	$ 59,853
Cost of revenue	[2]	4,239	5,343	14,000	18,199
Gross profit		13,340	13,214	38,953	41,654
Operating expenses		18,268	17,673	55,668	57,528
Operating income (loss)		(4,928)	(4,459)	(16,715)	(15,874)
Consumer Media
Segment Reporting Information [Line Items]
Revenue		4,733		14,100
Mobile Services
Segment Reporting Information [Line Items]
Revenue		7,348		22,771
Games
Segment Reporting Information [Line Items]
Revenue		5,498		16,082
Operating Segments | Consumer Media
Segment Reporting Information [Line Items]
Revenue		4,733	4,197	14,100	16,817
Cost of revenue		955	981	2,976	3,545
Gross profit		3,778	3,216	11,124	13,272
Operating expenses		3,448	3,217	10,805	10,957
Operating income (loss)		330	(1)	319	2,315
Operating Segments | Mobile Services
Segment Reporting Information [Line Items]
Revenue		7,348	7,678	22,771	23,597
Cost of revenue		2,052	2,134	6,502	7,750
Gross profit		5,296	5,544	16,269	15,847
Operating expenses		6,825	6,437	21,160	21,261
Operating income (loss)		(1,529)	(893)	(4,891)	(5,414)
Operating Segments | Games
Segment Reporting Information [Line Items]
Revenue		5,498	6,682	16,082	19,439
Cost of revenue		1,228	2,226	4,501	6,842
Gross profit		4,270	4,456	11,581	12,597
Operating expenses		5,447	5,071	15,459	15,108
Operating income (loss)		(1,177)	(615)	(3,878)	(2,511)
Corporate
Segment Reporting Information [Line Items]
Cost of revenue		4	2	21	62
Operating expenses		2,548	2,948	8,244	10,202
Operating income (loss)		$ (2,552)	$ (2,950)	$ (8,265)	$ (10,264)

[1] Quarters ended September 30, Components of Revenue2018 2017License Fees5,827 6,873Service Revenue11,752 11,684Net Revenue17,579 18,557 Nine Months Ended September 30, Components of Revenue2018 2017License Fees$17,770 $23,677Service Revenue35,183 36,176Net Revenue$52,953 $59,853

[2] Quarters ended September 30, Components of Cost of Revenue2018 2017License Fees1,523 2,163Service Revenue2,716 3,180Net Revenue Costs4,239 5,343 Nine Months Ended September 30, Components of Cost of Revenue2018 2017License Fees$4,743 $6,683Service Revenue9,257 11,516Net Revenue Costs$14,000 $18,199