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

OTHER NONCURRENT ASSETS - Change in the balance of other investments (Details)

v3.21.1
OTHER NONCURRENT ASSETS - Change in the balance of other investments (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
OTHER NONCURRENT ASSETS    
Ending balance $ 3,000,000  
Percentage of annual interest rate due in two years 3.00%  
Change in fair value, net $ 3,000,000.0 $ 0