Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Weighted-average Assumptions (Details)

v3.21.2
SHARE-BASED COMPENSATION - Weighted-average Assumptions (Details) - Market-based Restricted Share Units
9 Months Ended
Sep. 30, 2021
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant date share price (USD per share) $ 13.68
Risk-free interest rate 0.50%
Expected dividend yield 0.00%
Expected volatility 90.00%
Minimum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected life (in years) 2 years 4 months 24 days
Maximum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected life (in years) 3 years 6 months