Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED COMPENSATION - Common Stock to Employees (Details)

v3.21.1
STOCK BASED COMPENSATION - Common Stock to Employees (Details) - Employee
3 Months Ended
Mar. 31, 2020
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate, Minimum 0.70%
Risk-free interest rate, Maximum 0.90%
Expected volatility, Minimum 52.70%
Expected volatility, Maximum 52.90%
Expected life, Minimum (in years) 5 years 10 months 24 days
Expected life, Maximum (in years) 6 years 1 month 6 days
Fair value of Common Stock $ 3.34