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Significant Contracts (Details) - Royalty Agreement With QVC - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |
Net revenue from QVC | $ 5,160 | $ 6,420 | $ 17,960 | $ 19,900 |
Percentage of revenue from QVC | 47.00% | 78.00% | 59.00% | 78.00% |
Receivables from QVC | $ 5,300 |  | $ 5,300 |  | $ 5,680
Percentage of total receivables from QVC | 53.00% |  | 53.00% |  | 52.00%

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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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Total accounts receivable from sale of goods and services rendered during the reporting period with reference to QVC only. + References No definition available. + Details
Name: | xelb_AccountsReceivableFromSaleOfGoodsAndServices
Namespace Prefix: | xelb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The percentage accounts receivable to the total receivables in the year. + References No definition available. + Details
Name: | xelb_AccountsReceivablesPercentage
Namespace Prefix: | xelb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The percentage of QVC net revenue to total net revenue for the period. + References No definition available. + Details
Name: | xelb_QvcNetRevenuePercentage
Namespace Prefix: | xelb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts with reference to QVC only + References No definition available. + Details
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Namespace Prefix: | xelb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |