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Prepayments and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2022

Prepaid Expense and Other Assets, Current [Abstract]

Summary of Prepayments and Other Current Assets

Prepayments and other current assets consisted of the following:

		As of December 31,
		2021				2022
		RMB				RMB				US$
Prepayment for service			1,672				11,157				1,618
Unbilled revenue (Note 15)			—				10,800				1,566
Deductible value-added tax input			16,487				8,976				1,301
Prepayment for acquisition of inventories			8,286				6,910				1,002
Loans receivable – current portion (Note 9)			—				4,000				580
Staff advances			1,257				940				136
Others			1,693				2,400				347
			29,395				45,183				6,550

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- Definition

Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.

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