Name:	bzun_AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation
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Period Type:	duration

Amount of reversal of expense for expected credit loss on accounts receivable.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Amount of additions to the reserve for expected credit loss on accounts receivable before any reversal of expense.

No definition available.

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Period Type:	duration

Amount of additional allowance recognized during the period for accounts receivable from a specific distributor due to reassessment of recoverability

No definition available.

Name:	bzun_IncrementalAllowanceForCreditLossesDistributorArbitration
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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- References

No definition available.

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Balance Type:	na
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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of allowance for credit loss on accounts receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of direct write-downs of accounts receivable charged against the allowance.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Data Type:	xbrli:monetaryItemType
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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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