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Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, ¥ in Millions |  |  | 1 Months Ended | 12 Months Ended | 45 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 30, 2022 USD ($) $ / shares shares | Mar. 29, 2022 | Apr. 30, 2020 CNY (¥) | Dec. 31, 2023 USD ($) segment $ / shares shares | Dec. 31, 2023 CNY (¥) segment | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2019 | Dec. 31, 2023 CNY (¥)
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Share Subdivision ratio | 10 |  |  |  |  |  |  |  |  |
Ordinary shares, authorized share capital | $ 30,000 |  |  |  |  |  |  |  |  |
Ordinary shares, shares authorized (in shares) | shares | 5,000,000,000 |  |  | 5,000,000,000 |  | 5,000,000,000 |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares | $ 0.000006 |  |  | $ 0.000006 |  | $ 0.000006 |  |  |  |
ADS to ordinary shares conversion ratio | 10 | 1 |  |  |  |  |  |  |  |
Allowance for credit loss |  |  |  | $ 0 |  | $ 0 |  |  |  |
Land use rights lease term |  |  |  |  |  |  |  |  | 30 years |
Amortization expenses |  |  |  | 700,000 |  | 500,000 |  | $ 500,000 |  |
Finite-lived intangible assets, Amortization expense, year one |  |  |  | 3,100,000 |  |  |  |  |  |
Finite-lived intangible assets, Amortization expense, year two |  |  |  | 2,900,000 |  |  |  |  |  |
Finite-lived intangible assets, Amortization expense, year three |  |  |  | 2,700,000 |  |  |  |  |  |
Finite-lived intangible assets, Amortization expense, year four |  |  |  | 2,500,000 |  |  |  |  |  |
Finite-lived intangible assets, Amortization expense, year five |  |  |  | 2,300,000 |  |  |  |  |  |
Finite-lived intangible assets, Amortization expense, after year five |  |  |  | 0 |  |  |  |  |  |
Deferred income |  |  |  | 28,738,000 |  | 21,360,000 |  |  |  |
Unrecognized tax benefits and related interest and penalties |  |  |  | $ 0 |  | 0 |  | 0 |  |
Number of operating segments | segment |  |  |  | 1 | 1 |  |  |  |  |
Number of reportable segments | segment |  |  |  | 1 | 1 |  |  |  |  |
Revenue |  |  |  | $ 266,719,000 |  | 212,672,000 |  | 144,105,000 |  |
Aggregate amount of cash and cash equivalents |  |  |  | 790,151,000 |  | 1,008,470,000 |  | 964,100,000 |  |
RMB |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate amount of cash and cash equivalents |  |  |  | 25,093,000 |  | 45,486,000 |  |  |  |
Customer Concentration Risk | One Customer | Revenue |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  | 59,400,000 |  | 52,500,000 |  | $ 40,600,000 |  |
Debtor Concentration Risk | One Customer | Accounts Receivable |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  | 7,800,000 |  | 9,300,000 |  |  |  |
Foreign Currency Risk | Cash and Cash Equivalents | RMB |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate amount of cash and cash equivalents |  |  |  | $ 25,100,000 |  | $ 45,500,000 |  |  |  |
Concentration risk percentage |  |  |  | 3.00% | 3.00% | 5.00% | 5.00% |  |  |
Level 1 |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Equity investments with readily determinable fair value |  |  |  | $ 9,200,000 |  | $ 6,400,000 |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred income |  |  |  | 2,100,000 |  | 900,000 |  |  |  |
Huizheng |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Upfront payment | ¥ |  |  | ¥ 90.0 |  | ¥ 70.0 |  | ¥ 70.0 |  |  | ¥ 230.0
Huizheng | Collaborative Agreement |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred income |  |  |  | 26,700,000 |  | 20,500,000 |  |  |  |
Software |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets, net |  |  |  | $ 2,200,000 |  | $ 1,500,000 |  |  |  |
Software | Minimum |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  | 3 years |  |  |  |  |  |
Software | Maximum |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  | 5 years |  |  |  |  |  |
Capitalized Sales Based Milestone Fees |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets, net |  |  |  | $ 11,200,000 |  |  |  |  |  |

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