Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Fair Value of options (Details)

v3.22.1
SHARE-BASED COMPENSATION - Fair Value of options (Details) - Stock Options
3 Months Ended
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rates 0.91%
Expected life 5 years
Expected volatility 40.81%
Expected dividend yield 0.00%