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Prepayments And Other Receivables | 9 Months Ended
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Sep. 30, 2020
Prepaid Expense and Other Assets, Current [Abstract] |
Prepayments And Other Receivables | 3. Prepayments and Other Receivables
|  | As of December 31, |  |  | As of September 30, |
|  | 2019 |  |  | 2020 |
|  | RMB |  |  | RMB |  |  | US$ (Note 2.5) |
Prepayments: |  |  |  |  |  |  |  |  |  |  |  |
—Prepayments to CRO vendors |  |  | 78,740 |  |  |  | 72,285 |  |  |  | 10,646 |
—Prepayments for stock repurchase program (Note 11) |  |  | — |  |  |  | 34,051 |  |  |  | 5,015 |
—Prepayments for other services |  |  | 880 |  |  |  | 1,722 |  |  |  | 254 |
Receivables due from employees (Note (i)) |  |  | 16,201 |  |  |  | — |  |  |  | — |
Loans to an affiliate (Note 21) |  |  | — |  |  |  | 52,000 |  |  |  | 7,659 |
Value-added tax recoverable |  |  | 12,517 |  |  |  | 25,330 |  |  |  | 3,731 |
Rental deposits |  |  | 546 |  |  |  | 994 |  |  |  | 146 |
Interest receivables |  |  | 764 |  |  |  | — |  |  |  | — |
Others |  |  | 26,388 |  |  |  | 33,457 |  |  |  | 4,928 |
|  |  | 136,036 |  |  |  | 219,839 |  |  |  | 32,379 |
Note: (i) The balance mainly represented the receivables due from employees, which were arising from the Group’s obligation to pay the withholding individual income tax (“IIT”) for those employees’ stock option activities and was collected by the Group in January 2020.

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