The amount claims outstanding from insurance company.

No definition available.

Name:	hx_FinancialGuaranteeInsuranceContractClaimsOutstanding
Namespace Prefix:	hx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of loan principal and interest which the third party insurance company charges borrowers for loans facilitated.

+ References

No definition available.

+ Details

Name:	hx_PercentageOfInsuranceFeeOnBorrowing
Namespace Prefix:	hx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of insurance policy premium payable by the borrowers.

+ References

No definition available.

+ Details

Name:	hx_PercentageOfInsurancePolicyPremium
Namespace Prefix:	hx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of loan default risk premium which the third party insurance company charges borrowers for loans facilitated.

+ References

No definition available.

+ Details

Name:	hx_PercentageOfLoanDefaultRiskPremium
Namespace Prefix:	hx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of service fee which the third party insurance company charges borrowers for loans facilitated.

+ References

No definition available.

+ Details

Name:	hx_PercentageOfServiceFee
Namespace Prefix:	hx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	hx_TermOfAgreement
Namespace Prefix:	hx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of expense accrued as of the reporting date related to risk management activities (not including reinsurance) for the mitigating of claim liabilities related to financial guarantee insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 9
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=99382878&loc=SL5749324-161292

+ Details

Name:	us-gaap_FinancialGuaranteeInsuranceContractsRiskManagementActivitiesMitigatingClaimLiabilitiesAccruedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_FinancialGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=hx_InsuranceAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherCommitmentsAxis=hx_InvestorProtectionServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Material Terms and Conditions of the Insurance Agreement (Details) - USD ($)			12 Months Ended
	Feb. 01, 2018	Feb. 01, 2017	Mar. 31, 2020	Mar. 31, 2019
Guarantee Plan
Guarantor Obligations [Line Items]
Percentage of service fee			0.50%
Insurance policy premium (in percentage)			4.50%
Insurance Agreement
Guarantor Obligations [Line Items]
Percentage of insurance fee on borrowings		2.00%
Percentage of loan default risk premium	2.00%
Percentage of service fee	2.00%
Claims for compensation outstanding			$ 0
Contingent liability			$ 0	$ 0
Investor protection service \| Insurance Agreement
Guarantor Obligations [Line Items]
Term of agreement (in years)		1 year