Annual report pursuant to Section 13 and 15(d)

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

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EARNINGS (LOSS) PER COMMON SHARE - Schedule of Antidilutive Securities (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 6,049 5,992 18,424
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 1,506 1,711 2,091
Restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 280 125 202
Liability-classified restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 107 0 0
Earnout incentive awards subject to vesting      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 0 0 95
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 5,731
Options and warrants issued to underwriter      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 600 600 600
Earnout incentive awards subject to issuance      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities that were excluded from EPS (in shares) 0 0 9,705