XML 71 R60.htm IDEA: XBRL DOCUMENT v3.21.2
DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details) - Interest rate swap agreement - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 12, 2017
Derivative instruments    
Gain resulted from changes in fair values of the interest rate swap agreement $ (15)  
Line of credit    
Derivative instruments    
Interest rate swap agreement   $ 8,000