Quarterly report pursuant to Section 13 or 15(d)

CONCENTRATION - Customer Concentrations (Details)

v3.21.2
CONCENTRATION - Customer Concentrations (Details) - Customer Concentrations
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Revenue | Customer A          
CONCENTRATIONS          
Concentration risk (as a percent) 99.38% 113.07% 101.16% 12.79%  
Revenue | Customer B          
CONCENTRATIONS          
Concentration risk (as a percent)       52.21%  
Revenue | Customer C          
CONCENTRATIONS          
Concentration risk (as a percent) 14.98%     36.04%  
Revenue | Top Three Customers          
CONCENTRATIONS          
Concentration risk (as a percent) 114.36% 113.07% 101.16% 101.04%  
Accounts Receivable | Customer A          
CONCENTRATIONS          
Concentration risk (as a percent)     61.63%   89.02%
Accounts Receivable | Top Customer          
CONCENTRATIONS          
Concentration risk (as a percent)     61.63%   89.02%