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Share-based Compensation - Additional Information (Detail) |  | 12 Months Ended
--- | --- | ---
Dec. 09, 2016 ¥ / shares shares | Dec. 09, 2016 $ / shares shares | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Share-based compensation |  |  |  |  |  |
Share-based compensation expense |  |  | ¥ 2,257,795 | $ 309,317 | ¥ 4,935,782 | ¥ 24,053,760
Total intrinsic value of options exercised |  |  | 3,938,396 | 539,558 | 3,056,001 | 2,023,265
Total fair value of shares vested |  |  | 2,257,960 | $ 309,339 | 29,797,645 | ¥ 50,943,916
2016 Plan |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |
Options expiration period | 10 years | 10 years |  |  |  |
Total intrinsic value of options exercised | ¥ |  |  | ¥ 3,938,396 |  | ¥ 3,601,562 |
Shares reserved for issuance | shares | 1,000,000 | 1,000,000 |  |  |  |
Exercise price, options per share. | (per share) | ¥ 0.0006 | $ 0.0001 |  |  |  |
2016 Plan | Minimum |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |
Options vesting period | 3 years | 3 years |  |  |  |
2016 Plan | Maximum |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |
Options vesting period | 5 years | 5 years |  |  |  |

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