Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Fixed assets	$ 2,072	$ 2,231
Net operating loss carryforwards	45,002	44,995
Accruals, reserves and other	3,726	4,917
Foreign tax credit	6,086	5,767
Stock-based compensation	2,781	1,813
Research and development credit	2,839	3,143
Other	2,884	2,585
Total deferred tax assets	65,390	65,451
Deferred tax liabilities:
Fixed assets	0	0
Other	(9)	(10)
Net deferred tax assets	63,167	61,932
Less valuation allowance	(63,711)	(63,015)
Net deferred tax liability	(544)	(1,083)
Macrospace, MIG and iFone
Deferred tax liabilities:
Intangible assets	(498)	(931)
GameSpy
Deferred tax liabilities:
Intangible assets	(506)	0
Blammo
Deferred tax liabilities:
Intangible assets	(261)	(429)
Griptonite
Deferred tax liabilities:
Intangible assets	(949)	(2,149)
United States of America
Deferred tax assets:
Fixed assets	571	644
Net operating loss carryforwards	32,795	31,318
Accruals, reserves and other	3,605	4,821
Foreign tax credit	6,086	5,767
Stock-based compensation	2,723	1,748
Research and development credit	2,839	3,143
Other	2,873	2,573
Total deferred tax assets	51,492	50,014
Deferred tax liabilities:
Fixed assets	0	0
Other	0	0
Net deferred tax assets	50,037	47,865
Less valuation allowance	(50,037)	(47,865)
Net deferred tax liability	0	0
United States of America | Macrospace, MIG and iFone
Deferred tax liabilities:
Intangible assets	0	0
United States of America | GameSpy
Deferred tax liabilities:
Intangible assets	(506)	0
United States of America | Blammo
Deferred tax liabilities:
Intangible assets	0	0
United States of America | Griptonite
Deferred tax liabilities:
Intangible assets	(949)	(2,149)
Foreign Tax Authority
Deferred tax assets:
Fixed assets	1,501	1,587
Net operating loss carryforwards	12,207	13,677
Accruals, reserves and other	121	96
Foreign tax credit	0	0
Stock-based compensation	58	65
Research and development credit	0	0
Other	11	12
Total deferred tax assets	13,898	15,437
Deferred tax liabilities:
Fixed assets	0	0
Other	(9)	(10)
Net deferred tax assets	13,130	14,067
Less valuation allowance	(13,674)	(15,150)
Net deferred tax liability	(544)	(1,083)
Foreign Tax Authority | Macrospace, MIG and iFone
Deferred tax liabilities:
Intangible assets	(498)	(931)
Foreign Tax Authority | GameSpy
Deferred tax liabilities:
Intangible assets	0	0
Foreign Tax Authority | Blammo
Deferred tax liabilities:
Intangible assets	(261)	(429)
Foreign Tax Authority | Griptonite
Deferred tax liabilities:
Intangible assets	$ 0	$ 0