Quarterly report pursuant to Section 13 or 15(d)

NET INCOME (LOSS) PER SHARE - Antidilutive Shares (Details)

v3.19.2
NET INCOME (LOSS) PER SHARE - Antidilutive Shares (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares 0 600,000 25,618,000 600,000
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares 0 600,000 18,368,000 600,000
Performance stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares 0 0 7,250,000 0
Options Outside the Amended 2013 Plan [Member] | Amended 2013 Plan [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Unvested stock options excluded from anti-dilutive shares 10,750,000 10,750,000 10,750,000 10,750,000