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FAIR VALUE MEASUREMENTS - Schedule of fair value measurement valuation (Details) - Level 3 $ in Thousands | Dec. 31, 2020 USD ($)
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Fair Value |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Contingent consideration on acquisition date | $ 8,249
Option pricing model | Weighted Average | Operating results growth rate |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Contingent consideration, measurement input | 0.048
Option pricing model | Weighted Average | Discount rate |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Contingent consideration, measurement input | 0.068

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