STOCK-BASED COMPENSATION - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Number Of Options
Outstanding at the beginning of the period (in shares)	2,916,000	2,938,000
Exercised (in shares)	(150,000)	(20,000)
Canceled (in shares)	(47,000)	(2,000)
Outstanding at the end of the period (in shares)		2,916,000	2,938,000
Vested or expected to vest at the end of the period (in shares)	2,719,000
Exercisable and vested at the end of the period (in shares)	2,719,000
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 0.415	$ 0.416
Exercised (in shares)	0.800	0.360
Outstanding at the end of the period (in dollars per share)		$ 0.415	$ 0.416
Vested or expected to vest at the end of the period (in dollars per share)	0.372
Exercisable and vested at the end of the period (in dollars per share)	$ 0.372
Aggregate Intrinsic Value
Outstanding Value		$ 2,546,800	$ 1,869,200
Vested or expected to vest at the end of the period	$ 2,476,300
Exercisable and vested at the end of the period	$ 2,476,300
Weighted Average Remaining Contractual Life (in years)
Outstanding at the end of the period		6 years 2 months 16 days	6 years 8 months 27 days
Vested or expected to vest at the end of the period	5 years 7 months 13 days
Exercisable and vested at the end of the period	5 years 7 months 13 days