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Summary of significant accounting policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Property, plant and equipment |
|  | Expected useful life
Office premises |  | 47 to 51 years
Leasehold improvements |  | Over terms of the leases or the useful lives whichever is less
Furniture, fixtures and office equipment |  | 3 to 5 years
Motor vehicles |  | 4 years
Testing equipment |  | 3 years
Engineering segment backlog |
|  | 2022 |  |  | 2021 |
|  | US$’000 |  |  | US$’000 |
Engineering segment |  |  | 6,000 |  |  |  | 5,400 |
Schedule of Consolidated Balance Sheets |
CONSOLIDATED BALANCE SHEETS |  | December 31, 2021
|  | As Previously Reported |  | As Restated
Ordinary share |  | 5,322,459 no par value shares issued as of December 31, 2021 (2020: 3,260,559) |  | 7,899,832 no par value shares issued as of December 31, 2022 and 2021
Schedule of Consolidated Statements Of Operations And Comprehensive Income /(Loss) |
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME / (LOSS) |  | December 31 |
|  | As Previously Reported |  |  | As Restated |
|  | US$’000 |  |  | US$’000 |
Operating income / (loss) |  |  |  |  |  |
2021 |  |  | 781 |  |  |  | 771 |
2020 |  |  | (1,701 | ) |  |  | (272 | )
Net i ncome / (loss) per ordinary share attributable to Euro Tech Holdings Company Limited’s shareholders |  |  |  |  |  |  |  |
- Basic |  |  |  |  |  |  |  |
2021 |  | US$ 0.19 |  |  | US$ 0.13 |
2020 |  | US$ 0.25 |  |  | US$ 0.10 |
- Diluted |  |  |  |  |  |  |  |
2021 |  | US$ 0.19 |  |  | US$ 0.13 |
2020 |  | US$ 0.25 |  |  | US$ 0.10 |
Weighted average number of ordinary shares outstanding |  |  |  |  |  |  |  |
- Basic |  |  |  |  |  |  |  |
2021 |  |  | 5,154,759 |  |  |  | 7,732,132 |
2020 |  |  | 3,092,859 |  |  |  | 7,732,132 |
- Diluted |  |  |  |  |  |  |  |
2021 |  |  | 5,154,759 |  |  |  | 7,732,132 |
2020 |  |  | 3,092,859 |  |  |  | 7,732,132 |
Schedule of Consolidated Statements Of Shareholders Equity |
CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY |  | December 31 |
|  | As Previously Reported |  |  | As Restated |
Number of ordinary share |  |  |  |  |  |
Balance at December 31, 2020 |  |  | 3,260,559 |  |  |  | 7,899,832 |
Balance at December 31, 2021 |  |  | 5,322,459 |  |  |  | 7,899,832 |
ZHEJIANG TIANLAN |
Property, plant and equipment |
| Land use right | Over terms of the leases
| Buildings and leasehold improvements | 11 to 50 years, with 5% residual value
| Furniture, fixtures and office equipment | 5 years, with 5% residual value
| Motor vehicles | 5 years, with 5% residual value
| Plant and machineries | 5 to 10 years, with 5% residual value

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