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Ordinary Shares - Additional Information (Detail) $ / shares in Units, ¥ in Thousands, $ in Thousands |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 12, 2021 shares | Nov. 27, 2020 shares | Sep. 19, 2020 shares | Aug. 21, 2020 USD ($) shares | Feb. 10, 2020 | May 20, 2014 shares | Jun. 30, 2021 CNY (¥) shares | Mar. 31, 2021 $ / shares shares | Dec. 31, 2021 CNY (¥) shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) shares | Dec. 31, 2020 $ / shares shares | Jan. 01, 2019 $ / shares shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares authorized |  |  |  |  |  |  |  |  |  | 1,500,000,000 |  | 1,500,000,000 | 1,500,000,000 | 1,500,000,000
Common stock shares issued |  |  |  |  |  |  |  |  |  |  |  | 100,080,000 |  | 110,000,000
Common stock par or stated value per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.0001 |  |  | $ 0.0001 | $ 0.0001
Common stock shares outstanding |  |  |  |  |  |  |  |  |  |  |  | 100,080,000 |  |
Proceeds from Issuance of common stock |  |  |  |  |  |  |  |  | ¥ 0 | $ 0 | ¥ 78,998 | ¥ 0 |  |
Proceeds from IPO, net of issuance cost |  |  |  |  |  |  |  |  | ¥ 6,406,872 | $ 1,005,379 | ¥ 0 | ¥ 0 |  |
Issuance of Class A ordinary shares |  |  |  |  |  | 9,920,000 |  |  |  |  |  |  |  |
Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares issued |  |  |  |  |  |  |  |  |  | 748,953,103 |  |  | 11,533,640 |
Common stock shares outstanding |  |  |  |  |  |  |  |  |  | 727,855,233 |  |  | 7,875,787 |
Conversion of convertible redeemable preferred shares, Shares |  |  |  |  |  |  | 551,352,134 |  | 551,352,134 | 551,352,134 |  |  |  |
Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares issued |  |  |  |  |  |  |  |  |  | 140,830,401 |  |  | 121,108,037 |
Common stock shares outstanding |  |  |  |  |  |  |  |  |  | 140,830,401 |  |  | 121,108,037 |
Common stock voting rights |  | 15 |  |  | 10 |  |  |  |  |  |  |  |  |
Number of ordinary shares voting rights was modified |  | 121,108,037 |  |  |  |  |  |  |  |  |  |  |  |
IPO [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of new stock issued during the period |  |  |  |  |  |  | 110,400,000 |  |  |  |  |  |  |
Proceeds from IPO, net of issuance cost | ¥ |  |  |  |  |  |  | ¥ 6,406,872 |  |  |  |  |  |  |
Index Capital International Limited [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares transferred from one investor to another investor | 1,965,361 |  |  |  |  |  |  |  |  |  |  |  |  |
Duckling Fund L.P [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares transferred from one investor to another investor | 1,876,467 |  |  |  |  |  |  |  |  |  |  |  |  |
Coatue PE Asia 26 LLC [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of new stock issued during the period |  |  |  | 4,122,853 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of common stock | $ |  |  |  | $ 11,431 |  |  |  |  |  |  |  |  |  |
Image Frame Investment (HK) Limited [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares transferred from one investor to another investor |  |  |  | 3,752,934 |  |  |  |  |  |  |  |  |  |
TWL Fellows Holding Limited [Member] | Treasury Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of Class A ordinary shares |  |  | 3,657,853 |  |  |  |  |  |  |  |  |  |  |
TECHWOLF LIMITED [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of new stock issued during the period |  | 24,780,971 |  |  |  |  | 24,745,531 |  |  |  |  |  |  |
Number of shares repurchased |  |  |  |  |  |  |  | 1,181,339 |  |  |  |  |  |
Repurchase price per share | $ / shares |  |  |  |  |  |  |  | $ 5.33 |  |  |  |  |  |
TECHWOLF LIMITED [Member] | Treasury Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of Class A ordinary shares |  |  |  |  |  | 9,920,000 |  |  |  |  |  |  |  |

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