Post-effective amendment to a registration statement that is not immediately effective upon filing

SHARE-BASED COMPENSATION (Details 4)

v3.21.2
SHARE-BASED COMPENSATION (Details 4)
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Risk-free interest rate 0.90% 0.44%    
Expected average years until exercised 5 years 2 months 8 days 5 years 7 months 2 days    
Expected dividend yield 0.00% 0.00%    
Expected volatility 28.00% 29.00%    
Airspan [Member]        
Risk-free interest rate   0.55% 1.96% 2.75%
Expected average years until exercised     5 years 5 years
Expected dividend yield   0.00% 0.00% 0.00%
Expected volatility   68.00% 61.00% 61.00%