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Share-Based Compensation - Additional Information (Detail) $ / shares in Units, ¥ in Thousands, $ in Thousands |  | 1 Months Ended | 6 Months Ended | 8 Months Ended | 12 Months Ended |  |  |  |  |  |  |
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Sep. 26, 2022 Employees shares | Sep. 30, 2022 USD ($) shares | Dec. 31, 2020 CNY (¥) shares | Dec. 31, 2020 shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2024 CNY (¥) shares | Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 CNY (¥) Employees | Dec. 31, 2022 $ / shares | Dec. 31, 2023 CNY (¥) shares | Dec. 31, 2021 USD ($) | Jun. 25, 2020 $ / shares | May 09, 2020 $ / shares | Apr. 19, 2018 shares | Aug. 20, 2016 shares | Jun. 20, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, number of shares authorized |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,290,234 | 3,690,599 | 3,001,365
Sharebased payment award expiration period |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |  |  |  |
Options vested in period fair value |  |  |  |  | $ 135,345 | ¥ 987,921 | ¥ 39,410 |  | ¥ 23,816 |  |  |  |  |  |  |  |
Compensation cost not yet recognized stock options |  |  |  |  |  |  |  | $ 5,197 |  |  | ¥ 37,938 |  |  |  |  |  |
Share Based Compensation, Options exercised total intrinsic value |  |  |  |  | $ 3,789 | ¥ 27,657 | ¥ 229 |  | 1,686 |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  | 14,939,945 | 14,939,945 |  | 21,005,541 |  |  | 21,005,541 |  |  |  |  |  |
Incremental expenses related to the cash settled component | ¥ |  |  |  |  |  |  |  |  | ¥ 27,413 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  |  |  |  | $ 0.74 |  |  | $ 3.07 |  | $ 0.66 |  |  |  |  |  |  |
Employee Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation cost not yet recognized period for recognition |  |  |  |  | 2 years 21 days | 2 years 21 days |  |  |  |  |  |  |  |  |  |  |
Twenty Twenty Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, number of shares authorized |  |  | 4,512,276 | 4,512,276 |  |  |  | 4,755,000 |  |  | 4,755,000 |  |  |  |  |  |
Vesting period |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |
ESIP NO.1 [Member] | Employee Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of shares |  |  |  | 2,614,636 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 20.02 | $ 13.2 |  |  |
ESIP NO.1 [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percenatge of discount in initial public offering |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  |  |
ESIP NO.2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share compensation guaranteed return percentage to eligible employees |  |  |  |  | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |
Number of eligible employees affected | Employees |  |  |  |  |  |  |  |  | 90 |  |  |  |  |  |  |  |
ESIP NO.2 [Member] | Employee Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of restricted shares lockup in first year |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of restricted shares lockup in second year |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of restricted shares lockup in third year |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |
ESIP NO.2 [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percenatge of discount in initial public offering |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  |  |
ESIP NO.2 [Member] | Common Class A [Member] | Employee Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of restricted shares lockup in first year |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of restricted shares lockup in second year |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of restricted shares lockup in third year |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum subscription amount per person | ¥ |  |  | ¥ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-IPO Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sharebased payment award expiration period |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |  |  |  |
Pre-IPO Plan [member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |
Pre-IPO Plan [member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |
Management Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |
Sharebased payment award expiration period |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, percentage of outstanding stock maximum |  |  |  |  | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |
2021 Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, number of shares authorized |  |  |  |  | 12,533,016 | 12,533,016 |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |
Options outstanding | 10,383,868 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total incremental cost | ¥ |  |  |  |  |  | ¥ 13,246 |  |  |  |  |  |  |  |  |  |  |
2021 Plan [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average Closing Share Price | $ |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |
2021 Plan [Member] | Share-based Payment Arrangement, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average Closing Share Price | $ |  |  |  |  |  |  |  |  |  |  |  | $ 15,000,000 |  |  |  |  |
2022 Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment award, number of shares authorized |  | 11,775,525 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of eligible employees affected | Employees | 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Replaced Grants In Period Gross | 10,125,723 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2022 Plan [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average Closing Share Price | $ |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2022 Plan [Member] | Share-based Payment Arrangement, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average Closing Share Price | $ |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2022 Plan [Member] | Share-Based Payment Arrangement, Tranche Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average Closing Share Price | $ |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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