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Condensed Financial Information of the Parent Company - Condensed Balance Sheets (Parenthetical) (Detail) - $ / shares | Dec. 31, 2021 | Apr. 27, 2021 | Dec. 31, 2020 | Dec. 31, 2017 | Nov. 29, 2017
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Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |
Ordinary shares, par value |  |  |  |  | $ 0.0001
Ordinary shares, shares authorized |  |  |  | 372,138,271 |
Common Class A [Member] |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |
Ordinary shares, par value | $ 0.0001 |  | $ 0.0001 |  |
Ordinary shares, shares authorized | 420,674,280 |  | 420,674,280 |  |
Ordinary shares, shares issued | 229,831,213 |  | 227,831,213 |  |
Ordinary shares, shares outstanding | 206,506,455 |  | 224,771,083 |  |
Common Class B [Member] |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |
Ordinary shares, par value | $ 0.0001 |  | $ 0.0001 |  |
Ordinary shares, shares authorized | 79,325,720 |  | 79,325,720 |  |
Ordinary shares, shares issued | 72,978,677 | 2,000,000 | 74,978,677 |  |
Ordinary shares, shares outstanding | 72,978,677 |  | 74,978,677 |  |
Parent Company [Member] | Common Class A [Member] |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |
Ordinary shares, par value | $ 0.0001 |  | $ 0.0001 |  |
Ordinary shares, shares authorized | 420,674,280 |  | 420,674,280 |  |
Ordinary shares, shares issued | 229,831,213 |  | 227,831,213 |  |
Ordinary shares, shares outstanding | 206,506,455 |  | 224,771,083 |  |
Parent Company [Member] | Common Class B [Member] |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |
Ordinary shares, par value | $ 0.0001 |  | $ 0.0001 |  |
Ordinary shares, shares authorized | 79,325,720 |  | 79,325,720 |  |
Ordinary shares, shares issued | 72,978,677 |  | 74,978,677 |  |
Ordinary shares, shares outstanding | 72,978,677 |  | 74,978,677 |  |

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