ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair value measured on recurring basis (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Contingent Consideration [Member]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance, beginning of period $ 1,921
Net income attributable to noncontrolling interests 0
Distribution (349)
Dividends paid to noncontrolling interests 0
Change in fair value (72)
Balance, end of period 1,500
The amount of total (losses)/income for the period included in earnings attributable to the change in unrealized losses/income relating to assets and liabilities still held at the reporting date 72
Employment Agreement Award [Member]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance, beginning of period 27,017
Net income attributable to noncontrolling interests 0
Distribution (632)
Dividends paid to noncontrolling interests 0
Change in fair value 1,213
Balance, end of period 27,598
The amount of total (losses)/income for the period included in earnings attributable to the change in unrealized losses/income relating to assets and liabilities still held at the reporting date (1,213)
Redeemable Noncontrolling Interest [Member]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance, beginning of period 10,564
Net income attributable to noncontrolling interests 129
Distribution 0
Dividends paid to noncontrolling interests (1,000)
Change in fair value 599
Balance, end of period 10,292
The amount of total (losses)/income for the period included in earnings attributable to the change in unrealized losses/income relating to assets and liabilities still held at the reporting date $ 0