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Income Taxes - Tax Effects of Temporary Differences (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Deferred tax assets, current portion:      
Deferred revenue     ¥ 646
Provision for doubtful debts     8,495
Tax loss carry forward     263
Accrued expenses     2,767
Government subsidies     2,354
Others     1,173
Less: Valuation allowance     171
Current deferred tax assets     15,527
Deferred tax assets, non-current portion:      
Deferred revenue ¥ 1,924 $ 296 1,566
Provision for doubtful debts 8,132 1,250  
Intangible assets and accrued expense 6,653 1,022 6,560
Equity investment loss 16,160 2,484 10,725
Tax loss carry forward 93,295 14,339 84,824
Share-based compensation 1,056 162 11,206
Government subsidies 1,647 253  
Others 758 117 1,145
Less: Valuation allowance 71,983 11,064 41,217
Non-current deferred tax assets 57,642 8,859 74,809
Deferred tax liabilities, non-current portion:      
Long-lived assets arising from business acquisitions 5,324 818 54,176
Outside basis difference on investment in VIEs 68,069 10,462 58,262
Non-current deferred tax liabilities ¥ 73,393 $ 11,280 ¥ 112,438