FAIR VALUE MEASUREMENTS - Schedule of Quantitative Information Level 3 Fair Value Assets and Liabilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Contingent Earn-Out Receivable | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Unobservable input projected revenue	$ 6.9
Measurement Input, Discount Rate | Fair Value, Measurements, Recurring | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Contingent earn out receivable, measurement input	0.0241
Measurement Input, Discount Rate | Fair Value, Measurements, Recurring | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Contingent earn out receivable, measurement input	0.0264