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Pension plan (Details Narrative) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CNY (¥)
Description related to pension plan | all employees were entitled to pension benefits equal to their own contributions plus 50% to 100% of individual fund account balances contributed by Far East, depending on their years of service with Far East. Far East was required to make specific contributions at approximately 10% of the basic salaries of the employees to an independent fund management company | all employees were entitled to pension benefits equal to their own contributions plus 50% to 100% of individual fund account balances contributed by Far East, depending on their years of service with Far East. Far East was required to make specific contributions at approximately 10% of the basic salaries of the employees to an independent fund management company |  |  |  |
Contributions percentage of basic salary for pension scheme | 16.00% | 16.00% |  |  |  |
Aggregate contributions to pension plans and retirement benefit schemes | $ | $ 191,000 |  | $ 192,000 |  | $ 302,000 |
ZHEJIANG TIANLAN |  |  |  |  |  |
Aggregate contributions to pension plans and retirement benefit schemes | ¥ |  | ¥ 3,710,000 |  | ¥ 2,766,000 |  | ¥ 2,691,000
ZHEJIANG TIANLAN | Bottoms |  |  |  |  |  |
Contributions percentage of basic salary for pension scheme |  |  | 12.00% | 12.00% |  |
ZHEJIANG TIANLAN | Tops |  |  |  |  |  |
Contributions percentage of basic salary for pension scheme |  |  | 14.00% | 14.00% |  |

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- Definition Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (g) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-25 + Details
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