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GOODWILL (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 10, 2018 | Dec. 31, 2018
GOODWILL |  |
Goodwill acquired during the year |  | $ 27,479
Ezbuy |  |
GOODWILL |  |
Goodwill acquired during the year | $ 27,479 | $ 27,479

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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=litb_EzbuyHoldingCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |