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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

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