INCOME TAXES - Components of the income tax provision (benefit) (Details) - USD ($)	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
INCOME TAXES
Current	$ 482,976	$ 446,769	$ 853,970
Deferred		43,186	(46,260)
Total	$ 482,976	$ 489,955	$ 807,710

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Name:	us-gaap_DeferredIncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration