WARRANT DERIVATIVE LIABILITY - Summary (Details) - USD ($)		1 Months Ended	3 Months Ended			12 Months Ended
	May 31, 2019	May 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
WARRANT DERIVATIVE LIABILITY
Common stock, shares issued			62,146,515			60,813,673
Exercise price of warrants				$ 1.00
Gain (loss) on warrant derivative liability			$ (1,198,744)	$ 1,375,620
2019 Warrants
WARRANT DERIVATIVE LIABILITY
Proceeds from issuance of common stock and warrants	$ 3,000,000
Shares issued in cashless exercise of warrants			747,208
Common stock, shares issued	3,000,000
Number of warrants issued	3,000,000
Share price	$ 1.00
Exercise price of warrants						$ 1.30
Warrant exercise price, decrease (in dollars per share)		$ 0.45			$ 0.45	$ 0.40
Common stock, other shares, outstanding			322,807		8,666,666	9,591,614
Warrants exercised			1,323,000
Adjustment to derivative liability			$ 1,523,117
Gain (loss) on warrant derivative liability			$ (1,198,744)	$ 1,375,620