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DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details) - Interest rate swap agreement - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Jun. 12, 2017
Derivative instruments    
Gain resulted from changes in fair values of the interest rate swap agreement $ 2  
Level 2    
Derivative instruments    
Fair values of interest rate swap agreement 7  
Line of credit    
Derivative instruments    
Interest rate swap agreement   $ 8,000
Prepaid Expenses and Other Current Assets    
Derivative instruments    
Fair values of interest rate swap agreement $ 7