Quarterly report pursuant to Section 13 or 15(d)

LOSS PER COMMON SHARE - Schedule of Antidilutive Securities (Details)

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LOSS PER COMMON SHARE - Schedule of Antidilutive Securities (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities that were excluded from EPS (in shares) 6,392 6,195
Outstanding warrants on common stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities that were excluded from EPS (in shares) 3,556 3,556
Outstanding options and warrants issued to advisor    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities that were excluded from EPS (in shares) 600 600
Restricted stock unit awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities that were excluded from EPS (in shares) 842 395
Outstanding stock options awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities that were excluded from EPS (in shares) 1,394 1,644