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Summary of Significant Accounting Policies - Foreign Currency Translation and Transaction (Details) | 3 Months Ended | 6 Months Ended |  |
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Jun. 30, 2024 ¥ / $ | Jun. 30, 2024 $ / $ ¥ / $ | Jun. 30, 2024 € / $ ¥ / $ | Jun. 30, 2023 ¥ / $ | Jun. 30, 2023 $ / $ | Jun. 30, 2023 € / $ | Jun. 30, 2024 ¥ / $ | Jun. 30, 2024 ¥ / $ $ / $ | Jun. 30, 2024 € / $ ¥ / $ | Jun. 30, 2023 ¥ / $ | Jun. 30, 2023 $ / $ | Jun. 30, 2023 € / $ | Jun. 30, 2024 $ / $ | Jun. 30, 2024 € / $ | Dec. 31, 2023 ¥ / $ | Dec. 31, 2023 $ / $ | Dec. 31, 2023 € / $
Multiple Foreign Currency Exchange Rates [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exchange rate on the balance sheet date | 7.2980 | 7.2980 | 7.2980 |  |  |  | 7.2980 | 7.2980 | 7.2980 |  |  |  | 1.3700 | 0.9342 | 7.1006 | 1.3246 | 0.9059
Average exchange rate | 7.2582 | 1.3397 | 0.9279 | 6.9795 | 1.3541 | 0.9201 | 6.9369 | 1.3322 | 0.9226 | 7.2141 | 1.3541 | 0.9269 |  |  |  |  |

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