EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended				6 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic EPS
Net income (loss)	$ 270,764	$ (116,234)	$ (291,021)	$ 220,777	$ 154,530	$ (70,244)
Weighted average shares	29,431,629		29,254,594		29,395,791	29,254,048
Basic income (loss) per share	$ 0.01		$ (0.01)		$ 0.01	$ 0.00
Diluted EPS
Net income (loss)	$ 270,764	$ (116,234)	$ (291,021)	$ 220,777	$ 154,530	$ (70,244)
Dilutive effect of stock options	1,555,604				1,606,339
Weighted average shares	30,987,233		29,254,594		31,002,130	29,254,048
Diluted income (loss) per share	$ 0.01		$ (0.01)		$ 0.01	$ 0.00
Antidilutive securities excluded from computation of earnings per share amount (in shares)	96,000		2,968,000		96,000	2,968,000