INCOME TAXES - Income tax provision (benefit) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
INCOME TAXES
Income (loss) before income taxes	$ 425,511	$ (414,610)
Income tax provision (benefit)	104,880	(73,041)
Net income (loss)	320,631	(341,569)
Current
Federal	(76,185)	0
State	0	0
Total Current	(76,185)	0
Deferred
Federal	148,151	(26,328)
State	32,914	(46,713)
Total Deferred	181,065	(73,041)
Income tax provision (benefit)	104,880	(73,041)
U.S. operations
INCOME TAXES
Income (loss) before income taxes	435,534	(403,419)
Foreign operations
INCOME TAXES
Income (loss) before income taxes	$ (10,033)	$ (11,191)