INCOME TAX - Tax Holiday and Preferential Tax Rate (Details) - USD ($)	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018
INCOME TAX
The aggregate amount of tax holiday and preferential tax rate	$ 2,642,450	$ 8,157,429
The aggregate effect on basic net income per share (in dollars per share)	$ 0.06	$ 0.18
The aggregate effect on diluted net income per share (in dollars per share)	$ 0.05	$ 0.17

The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday and preferential tax rate granted by the taxing jurisdiction.

No definition available.

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