Restricted Net Assets (Details)	12 Months Ended
Mar. 31, 2024 USD ($)
Restricted net assets [Line Items]
Restriction amounted (in Dollars)
Maximum percentage of restricted net assets of consolidated and unconsolidated subsidiaries	25.00%
Threshold maximum percentage of restricted net assets not met by the consolidated subsidiaries	25.00%
CHINA
Restricted net assets [Line Items]
Required minimum percentage of annual appropriations to general reserve fund or statutory surplus fund	10.00%
CHINA \| Statutory Surplus Reserve [Member] \| Domestic Enterprise [Member]
Restricted net assets [Line Items]
Required minimum percentage of annual appropriations to general reserve fund	10.00%
Maximum percentage of statutory surplus reserve related to entity's registered capital	50.00%

Minimum portion of after tax profit to be allocated to statutory surplus under PRC law.

No definition available.

Name:	bq_MinimumPortionOfAfterTaxProfitToBeAllocatedToStatutorySurplusUnderPRCLaw
Namespace Prefix:	bq_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of net after tax profits to be set aside prior to payment of dividends as general reserve fund or statutory surplus fund.

+ References

No definition available.

+ Details

Name:	bq_PercentageOfNetAfterTaxProfitsToBeSetAsidePriorToPaymentOfDividendsAsGeneralReserveFundOrStatutorySurplusFund
Namespace Prefix:	bq_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Required statutory surplus registered capital ratio to deforce compulsory net profit allocation to statutory surplus.

+ References

No definition available.

+ Details

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Namespace Prefix:	bq_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted net assets of the Company's subsidiaries and the VIEs.

+ References

No definition available.

+ Details

Name:	bq_RestrictedNetAssetsOfCompanysSubsidiariesAndVIEs
Namespace Prefix:	bq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Threshold maximum percentage of restricted net assets not met by the consolidated subsidiaries to disclose the financial statements for the parent company.

+ References

No definition available.

+ Details

Name:	bq_ThresholdMaximumPercentageOfRestrictedNetAssetsNotMetByTheConsolidatedSubsidiariesToDiscloseTheFinancialStatementsForTheParentCompany
Namespace Prefix:	bq_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold maximum percentage of restricted net assets of consolidated and unconsolidated subsidiaries to the consolidated net assets.

+ References

No definition available.

+ Details

Name:	bq_ThresholdMaximumPercentageOfRestrictedNetAssetsOfConsolidatedAndUnconsolidatedSubsidiariesToTheConsolidatedNetAssets
Namespace Prefix:	bq_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bq_StatutoryReservesAxis=bq_StatutorySurplusReserveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bq_DomesticEnterpriseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: