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FAIR VALUE MEASUREMENTS - Contingent consideration (Details)	Dec. 31, 2020	Dec. 31, 2019
Recurring | Discount rate | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Recurring Basis [Line Items]
Discount rate	14.80%	14.80%

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- Definition

Value of input used to measure contingent consideration liability from business combination.

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- Definition

Fair Value Measurement Recurring Basis

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