STOCKHOLDERS' EQUITY - Narrative (Details)							3 Months Ended		12 Months Ended
	Mar. 08, 2021 USD ($) $ / shares shares	Feb. 05, 2021 shares	Aug. 03, 2020 USD ($) $ / shares shares	Feb. 11, 2020 USD ($) $ / shares shares	Jul. 19, 2019 USD ($) $ / shares shares	Jul. 18, 2019 trading_day $ / shares shares	Mar. 31, 2021 USD ($) shares	Mar. 31, 2020 USD ($) shares	Dec. 31, 2020 shares	Dec. 11, 2020 $ / shares shares	Feb. 29, 2020 $ / shares shares
Class of Stock [Line Items]
Shares issued, value | $	$ 23,000,000.0		$ 6,200,000				$ 26,850,021	$ 9,467,166
Expected life (years)						5 years	3 years 9 months 21 days		4 years 21 days
Number of shares called by warrants						142,711				3,964,065
Exercise price (in dollars per share) | $ / shares						$ 15.17				$ 1.182
Proceeds from warrants exercised for cash | $							$ 1,485,351	0
Consecutive trading days | trading_day						10
Minimum
Class of Stock [Line Items]
Exercise price (in dollars per share) | $ / shares										$ 0.90
Over-Allotment Option
Class of Stock [Line Items]
Shares issued, value | $				$ 11,000,000.0
Shares issued				1,252,173
Sales Agreement
Class of Stock [Line Items]
Shares issued, value | $							$ 6,300,000
Shares issued		6,300,000					2,820,493
Common Stock
Class of Stock [Line Items]
Shares issued, value | $							$ 1,963	$ 835
Shares issued	16,806,722		5,130,390	8,353,480			19,627,215	8,353,480
Price per share (usd per share) | $ / shares	$ 1.3685		$ 1.20
Number of rights per share						1
Number of shares called by warrants				9,599,999
Warrants exercised for cash (shares)							1,298,567
Warrants outstanding (shares)							7,747,587
Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Expected life (years)				5 years							5 years
Number of rights per share				1							1
Exercise price (in dollars per share) | $ / shares				$ 1.15
Preferred Stock
Class of Stock [Line Items]
Shares issued, value | $								$ 125
Shares issued								1,246,519
Class A | Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Number of shares issued				7,101,307
Price per share (usd per share) | $ / shares				$ 1.15
Exercise price (in dollars per share) | $ / shares											$ 1.15
Class B | Preferred Stock | Over-Allotment Option
Class of Stock [Line Items]
Number of shares issued				1,246,519
Price per share (usd per share) | $ / shares				$ 1.15
Series A Preferred | Preferred Stock
Class of Stock [Line Items]
Shares issued				1,246,519
Preferred shares converted to common shares (shares)									1,246,519
Wedbush | Satisfy success fee
Class of Stock [Line Items]
Expected life (years)					5 years
Number of shares called by warrants					42,928
Exercise price (in dollars per share) | $ / shares					$ 18.90
Warrant value | $					$ 500,000
Due to related party | $					1,000,000.0
Cash payment to related party | $					$ 500,000