XML 81 R64.htm IDEA: XBRL DOCUMENT
v3.25.1

Summary of significant accounting policies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Summary of significant accounting policies |  |
Contract revenue on uncompleted contracts as beginning balance | $ 4,022 | $ 523
New contract awards during the year | 5,621 | 9,044
Contract adjustment | 30 | 252
Contract revenue recognized for the year | (5,834) | (5,797)
Backlog as ending balance | $ 3,839 | $ 4,022

X
- References No definition available. + Details
Name: | clwt_BacklogRevenueRemainingPerformanceObligation
Namespace Prefix: | clwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | clwt_ContractRevenueAdjustment
Namespace Prefix: | clwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | clwt_ContractRevenueRecognizedForTheYear
Namespace Prefix: | clwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | clwt_NewContractRevenueAwardsDuringTheYear
Namespace Prefix: | clwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant