FAIR VALUE MEASUREMENTS - Schedule of fair value measurement valuation (Details) - Level 3 $ in Thousands	Jun. 30, 2021 USD ($)
Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	$ 196
Option pricing model | Weighted average | Operating results growth rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, measurement input	(0.214)
Option pricing model | Weighted average | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, measurement input	0.031