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Note 5 - Property and Equipment, Net | 12 Months Ended
--- | ---
Dec. 31, 2023
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] |
5. | Property and equipment, net
Property and equipment consisted of the following:
|  | December 31, |
|  | 2022 |  |  | 2023 |
|  | $ |  |  | $ |
Office equipment |  |  | 549 |  |  |  | 495 |
Laboratory equipment |  |  | 1,499 |  |  |  | 1,585 |
Motor vehicles |  |  | 99 |  |  |  | 97 |
Leasehold improvements |  |  | 272 |  |  |  | 272 |
|  |  | 2,419 |  |  |  | 2,449 |
Less: accumulated depreciation |  |  | (551 | ) |  |  | (821 | )
Property and equipment, net |  |  | 1,868 |  |  |  | 1,628 |
Depreciation expenses for the years ended December 31, 2021, 2022 and 2023 were $61, $232 and $302, respectively.

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