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SEGMENT AND GEOGRAPHIC INFORMATION - CONCENTRATION RISK (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer Benchmark | Customer A
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	13.00%	10.00%
Revenue from Contract with Customer Benchmark | Customer B
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Accounts Receivable | Customer A
Concentration Risk [Line Items]
Concentration risk, percentage		12.00%	10.00%
Accounts Receivable | Customer B
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%	17.00%	13.00%

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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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