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Share-Based Compensation - Additional Information (Details) ¥ / shares in Units, ¥ in Thousands |  | 12 Months Ended |
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Sep. 17, 2015 shares | Dec. 31, 2021 CNY (¥) $ / shares shares | Dec. 31, 2021 CNY (¥) ¥ / shares shares | Dec. 31, 2020 CNY (¥) $ / shares shares | Dec. 31, 2020 CNY (¥) ¥ / shares shares | Dec. 31, 2019 shares | Nov. 30, 2020 CNY (¥)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of share options granted to employees under stock incentive plans |  |  |  |  |  | 0 |
Weighted average grant date fair value of options granted | (per share) |  | $ 1.73 | ¥ 11.56 | $ 1.27 | ¥ 8.31 |  |
Unrecognized compensation expenses related to options | ¥ |  | $ 53,652 | ¥ 53,652 | $ 99,975 | ¥ 99,975 |  |
Sunglow |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Unrecognized compensation expenses related to options | ¥ |  | $ 10,284 | ¥ 10,284 |  |  |  |
Sunglow | Guangdong Lizi |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Equity interests |  |  |  |  |  |  | 1.00%
Equity investments amount | ¥ |  |  |  |  |  |  | ¥ 175
2015 Share Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share incentive plan effective period | 10 years |  |  |  |  |  |
Maximum number of shares issued under share incentive plan | 12,727,272 |  |  |  |  |  |
2018 Share Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum number of shares issued under share incentive plan |  | 23,920,828 | 23,920,828 |  |  |  |
Number of share options granted to employees under stock incentive plans |  | 38,400,000 | 38,400,000 | 19,175,500 | 19,175,500 |  |
2018 Share Incentive Plan | Vested after 24 Months |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share options vested percentage |  | 40.00% | 40.00% | 40.00% | 40.00% |  |
2018 Share Incentive Plan | Vested in Two Equal Installments over Following 24 Months |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share options vested percentage |  | 60.00% | 60.00% | 60.00% | 60.00% |  |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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