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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Summary of Estimated Useful Lives and Residual Value of Property and Equipment | Plant and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:
Category |  | Estimated useful life |  | Residual value |
Mold and tooling |  | 2-5 years |  |  | 0 | %
Office equipment |  | 5 years |  |  | 5 | %
Machinery and electronic equipment |  | 3-10 years |  |  | 5 | %
Transportation equipment |  | 4 years |  |  | 5 | %
Leasehold improvements |  | Shorter of lease term or the estimated useful lives of the assets |  |  | 0 | %
Summary of Amortization of Intangible Assets with Finite Lives | Amortization of intangible assets with finite lives are computed using the straight-line method over the estimated useful lives as below:
Category |  | Estimated useful life
Software |  | 3-5 years
Patents and trademarks |  | 5 years
Summary of Revenue by Customer Incorporation Location | The following table presents revenue by customer incorporation location for the years ended December 31, 2020, 2021 and 2022, respectively:
|  | For the year ended December 31, |
|  | 2020 |  |  | 2021 |  |  | 2022 |
|  | RMB |  |  | % |  |  | RMB |  |  | % |  |  | RMB |  |  | US$ |  |  | % |
PRC |  |  | 164,153 |  |  |  | 91 | % |  |  | 49,683 |  |  |  | 87 | % |  |  | 33,975 |  |  |  | 4,926 |  |  |  | 77 | %
West Asia |  |  | 2,124 |  |  |  | 1 | % |  |  | — |  |  |  | — |  |  |  | 4,630 |  |  |  | 671 |  |  |  | 10 | %
Europe |  |  | 2,388 |  |  |  | 1 | % |  |  | 2,199 |  |  |  | 4 | % |  |  | 2,638 |  |  |  | 382 |  |  |  | 6 | %
East Asia |  |  | 4,550 |  |  |  | 3 | % |  |  | 4,404 |  |  |  | 8 | % |  |  | 798 |  |  |  | 116 |  |  |  | 2 | %
Other |  |  | 6,878 |  |  |  | 4 | % |  |  | 521 |  |  |  | 1 | % |  |  | 2,276 |  |  |  | 330 |  |  |  | 5 | %
Total net revenues |  |  | 180,093 |  |  |  | 100 | % |  |  | 56,807 |  |  |  | 100 | % |  |  | 44,317 |  |  |  | 6,425 |  |  |  | 100 | %
Summary of Operating Lease Liabilities | A maturity analysis of the Company’s operating lease liabilities and reconciliation of the undiscounted cash flows to the operating lease liabilities recognized on the consolidated balance sheet was as below:
|  | Office and production facilities rental |
|  | RMB |  |  | US$ |
2023 |  |  | 5,632 |  |  |  | 817 |
2024 |  |  | 4,290 |  |  |  | 622 |
2025 |  |  | 4,982 |  |  |  | 721 |
2026 |  |  | 6,448 |  |  |  | 935 |
2027 |  |  | 6,817 |  |  |  | 988 |
2028 and thereafter |  |  | 88,136 |  |  |  | 12,779 |
Minimum lease payments |  |  | 116,305 |  |  |  | 16,862 |
Less: imputed interest |  |  | (40,872 | ) |  |  | (5,926 | )
Present value of lease liabilities |  |  | 75,433 |  |  |  | 10,936 |
Less: Current portion |  |  | (5,520 | ) |  |  | (800 | )
Non-current portion of lease liabilities |  |  | 69,913 |  |  |  | 10,136 |
Summary of Future Minimum Lease Payments | As of December 31, 2021, future minimum lease payments under non-cancellable operating leases with initial terms in excess of one year consisted of the following:
|  | Office and production facilities rental |
|  | RMB |
2022 |  |  | 11,530 |
2023 |  |  | 5,926 |
2024 |  |  | 791 |
2025 |  |  | 1,252 |
2026 |  |  | 2,635 |
2027 and thereafter |  |  | 4,612 |
Total |  |  | 26,746 |

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