SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Loss per Common Share (Details) - shares	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Loss Per Common Share [Abstract]
Potentially dilutive securities (in shares)	27,047,033	13,362,319
Stock Options [Member]
Loss Per Common Share [Abstract]
Potentially dilutive securities (in shares)	8,686,068	8,103,165
Restricted Stock Units [Member]
Loss Per Common Share [Abstract]
Potentially dilutive securities (in shares)	4,729,758	730,994
Warrants [Member]
Loss Per Common Share [Abstract]
Potentially dilutive securities (in shares)	13,631,207	4,528,160

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration