Annual report pursuant to Section 13 and 15(d)

NET (LOSS) INCOME PER SHARE - Anti-dilutive Shares Excluded from Calculation (Details)

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NET (LOSS) INCOME PER SHARE - Anti-dilutive Shares Excluded from Calculation (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount (in shares) 6,384 0 0
Stock options      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount (in shares) 4,200 0 0
Restricted stock units      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount (in shares) 1,165 0 0
Performance stock units      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount (in shares) 1,019 0 0