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Accounts Receivable, Net (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] |
Summary of Accounts Receivable, Net | Accounts receivable, net, consisted of the following:
|  | As of December 31, |
|  | 2021 |  |  | 2022 |
|  | RMB |  |  | RMB |  |  | US$ |
Accounts receivable |  |  | 125,606 |  |  |  | 135,678 |  |  |  | 19,671 |
Allowance for doubtful accounts |  |  | (69,417 | ) |  |  | (115,380 | ) |  |  | (16,728 | )
|  |  | 56,189 |  |  |  | 20,298 |  |  |  | 2,943 |
Summary of Movements in Allowance for Doubtful Accounts | The movements in the allowance for doubtful accounts were:
|  | For the year ended December 31, |
|  | 2020 |  |  | 2021 |  |  | 2022 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Balance at the beginning of the year |  |  | (862 | ) |  |  | (10,051 | ) |  |  | (69,417 | ) |  |  | (10,064 | )
Additional provision charged to expense |  |  | (9,217 | ) |  |  | (59,347 | ) |  |  | (46,045 | ) |  |  | (6,676 | )
Foreign currency translation |  |  | 28 |  |  |  | (19 | ) |  |  | 82 |  |  |  | 12 |
Balance at the end of the year |  |  | (10,051 | ) |  |  | (69,417 | ) |  |  | (115,380 | ) |  |  | (16,728 | )

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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