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Taxation - Components of Deferred Taxes (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
--- | --- | --- | ---
Deferred tax assets |  |  |  |
Allowance for doubtful accounts |  | ¥ 35,359 | $ 5,549 | ¥ 22,343
Accrued staff cost and expenses |  | 97,883 | 15,360 | 42,091
Deferred revenue |  | 5,551 | 871 | 11,214
Tax losses | [1] | 489,664 | 76,839 | 404,178
VAT refund |  | 351 | 55 | 2,032
Less: Valuation allowances |  | (452,670) | (71,034) | (402,197)
Total deferred tax assets |  | 176,138 | 27,640 | 79,661
Deferred tax liabilities |  |  |  |
Identifiable intangible assets arising from acquisition |  | 52,460 | 8,232 | 63,570
Intangible assets and internally-developed software |  | 32,540 | 5,106 | 39,306
Outside basis difference and others |  | 437,963 | 68,726 | 452,023
Withholding income tax |  | 53,835 | 8,448 | 76,610
Total deferred tax liabilities |  | ¥ 576,798 | $ 90,512 | ¥ 631,509
[1] | Upon the acquisition of TTP on December 31, 2020, the Group recorded deferred tax assets due to tax losses and related valuation allowance by approximately RMB355,730 (US$54,518) and RMB355,730 (US$54,518), respectively.

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