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Property, Plant and Equipment, Net | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment, Net [Abstract] |
PROPERTY, PLANT AND EQUIPMENT, NET | 5. PROPERTY, PLANT AND EQUIPMENT, NET As of December 31, 2021 and 2022, property, plant and equipment consisted of the following:
|  | December 31, 2021 |  |  | December 31, 2022 |
Electronic equipment |  | $ | 910 |  |  | $ | 864 |
Office equipment and furniture |  |  | 78 |  |  |  | 66 |
Leasehold improvement |  |  | 85 |  |  |  | 186 |
|  |  | 1,073 |  |  |  | 1,116 |
Less: accumulated depreciation |  |  | (831 | ) |  |  | (956 | )
|  | $ | 242 |  |  | $ | 160 |
For the years ended December 31, 2020, 2021 and 2022, depreciation expense amounted to $156, $82 and $90 respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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