Segment Information (Segment Results) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenue	$ 11,708	$ 14,332	$ 36,840	$ 44,781
Cost of revenue	2,787	3,119	8,228	10,370
Gross profit	8,921	11,213	28,612	34,411
Operating expenses	15,734	17,672	45,301	52,759
Operating income (loss)	(6,813)	(6,459)	(16,689)	(18,348)
Consumer Media
Segment Reporting Information [Line Items]
Revenue	1,415	2,763	6,025	8,133
Mobile Services
Segment Reporting Information [Line Items]
Revenue	5,226	5,772	15,323	18,108
Games
Segment Reporting Information [Line Items]
Revenue	5,067	5,797	15,492	18,540
Operating Segments | Consumer Media
Segment Reporting Information [Line Items]
Revenue	1,415	2,763	6,025	8,133
Cost of revenue	374	418	1,194	1,393
Gross profit	1,041	2,345	4,831	6,740
Operating expenses	1,371	1,495	4,240	6,028
Operating income (loss)	(330)	850	591	712
Operating Segments | Mobile Services
Segment Reporting Information [Line Items]
Revenue	5,226	5,772	15,323	18,108
Cost of revenue	1,116	1,282	3,126	4,291
Gross profit	4,110	4,490	12,197	13,817
Operating expenses	5,950	5,890	19,126	18,367
Operating income (loss)	(1,840)	(1,400)	(6,929)	(4,550)
Operating Segments | Games
Segment Reporting Information [Line Items]
Revenue	5,067	5,797	15,492	18,540
Cost of revenue	1,288	1,414	3,883	4,671
Gross profit	3,779	4,383	11,609	13,869
Operating expenses	3,648	4,844	11,473	14,791
Operating income (loss)	131	(461)	136	(922)
Corporate
Segment Reporting Information [Line Items]
Cost of revenue	9	5	25	15
Operating expenses	4,765	5,443	10,462	13,573
Operating income (loss)	$ (4,774)	$ (5,448)	$ (10,487)	$ (13,588)