Taxation - Summary of Changes in Deferred Tax Asset and Liability Balances (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets, current portion:
Net operating loss carried forward	$ 315	$ 50
Amortization of intangible assets arising from intragroup transactions	69	69
Deferred tax assets, current portion, net	2,091us-gaap_DeferredTaxAssetsNetCurrent	1,185us-gaap_DeferredTaxAssetsNetCurrent
Deferred tax assets, non-current portion:
Net operating loss carried forward	6,103	3,676
Allowance for doubtful accounts	796	1,311
Amortization of intangible assets arising from intragroup transactions	105	175
Valuation allowance	(291)
Deferred tax assets, non-current portion, net	10,862us-gaap_DeferredTaxAssetsNetNoncurrent	9,430us-gaap_DeferredTaxAssetsNetNoncurrent
Deferred tax liability, non-current portion:
Outside basis difference	(8,552)	(8,074)
Content Copyrights [Member]
Deferred tax assets, current portion:
Amortization of intangible assets arising from intragroup transactions	1,675	1,033
Deferred tax assets, non-current portion:
Amortization of intangible assets arising from intragroup transactions	4,133	4,219
Online game licenses [Member]
Deferred tax assets, current portion:
Impairment of online game licenses	32	33
Deferred tax assets, non-current portion:
Impairment of online game licenses	$ 16	$ 49

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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