CAPITAL STOCK and EARNINGS PER SHARE (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic EPS:
Net income (loss)	$ 320,631	$ (341,569)
Weighted average shares	29,447,085	29,258,692
Net income (loss) per share	$ 0.01	$ (0.01)
Diluted EPS:
Net income (loss)	$ 320,631	$ (341,569)
Dilutive effect of stock options	1,588,270
Weighted average shares	31,035,355	29,258,692
Net income (loss) per share	$ 0.01	$ (0.01)
Antidilutive securities excluded from computation of earnings per share amount (in shares)	49,000	2,966,000