SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Major Customers (Details) - Customer concentration - customer |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Concentration Risk [Line Items] | |||
Concentration risk, number of customers | 3 | ||
Largest wholesaler | Sales Revenue, Net | |||
Concentration Risk [Line Items] | |||
Percentage of revenue from customers to total revenue | 31.00% | 31.00% | 34.00% |
Second largest wholesaler | Sales Revenue, Net | |||
Concentration Risk [Line Items] | |||
Percentage of revenue from customers to total revenue | 28.00% | 31.00% | 29.00% |
Third largest wholesaler | Sales Revenue, Net | |||
Concentration Risk [Line Items] | |||
Percentage of revenue from customers to total revenue | 26.00% | 25.00% | 26.00% |
Three largest customers | Sales Revenue, Net | |||
Concentration Risk [Line Items] | |||
Percentage of revenue from customers to total revenue | 85.00% | 87.00% | 89.00% |