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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Concentration Risk of Major Customers (Details) - Concentration risk by major customer - Sales Revenue, Net	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Largest wholesaler
Concentration of Major Customers
Percentage of revenue from customers to total revenue	31.00%	31.00%	31.00%	31.00%
Second largest wholesaler
Concentration of Major Customers
Percentage of revenue from customers to total revenue	28.00%	30.00%	28.00%	31.00%
Third largest wholesaler
Concentration of Major Customers
Percentage of revenue from customers to total revenue	26.00%	25.00%	26.00%	25.00%
Three Largest Customers
Concentration of Major Customers
Percentage of revenue from customers to total revenue	85.00%	86.00%	85.00%	87.00%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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