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LONG-TERM OBLIGATIONS (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 20, 2018
Line of Credit Facility [Line Items]              
Proceeds from Lines of Credit       $ 5,000      
Cash and temporary investments   $ 37,116 $ 37,116 $ 27,236 $ 26,072 $ 27,037  
First Tennessee Bank National Association | Revolving Credit facility              
Line of Credit Facility [Line Items]              
Revolving credit facility             $ 50,000
Line of credit outstanding borrowings   5,000 $ 5,000   4,998    
Proceeds from Lines of Credit $ 25,000            
Repaid credit facility   25,000          
Debt instrument description of non-default rate of interest     LIBOR Rate plus 1.00% or 1.25% per annum, depending on the leverage ratio.        
First Tennessee Bank National Association | Revolving Credit facility | Minimum              
Line of Credit Facility [Line Items]              
Variable interest rate in addition to reference rate     1.00%        
Non-usage fee for current loan agreement in annual amount percentage     0.15%        
First Tennessee Bank National Association | Revolving Credit facility | Maximum              
Line of Credit Facility [Line Items]              
Variable interest rate in addition to reference rate     1.25%        
Non-usage fee for current loan agreement in annual amount percentage     0.35%        
Jige International S.A. | Banque Europeenne Du Credit Mutuel              
Line of Credit Facility [Line Items]              
Unsecured fixed rate loan   $ 185 $ 185   $ 368    
Maturity date     Sep. 30, 2020        
Interest rate per annum     0.30%