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LONG-TERM OBLIGATIONS (Detail Textuals)
€ in Thousands, $ in Thousands
1 Months Ended 9 Months Ended
Jul. 19, 2018
USD ($)
Nov. 30, 2017
EUR (€)
Sep. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
First Tennessee Bank National Association ("First Tennessee") | Credit Facility        
Line of Credit Facility [Line Items]        
Revolving credit facility $ 50,000      
Description of reference rate basis     LIBOR Rate plus 1.50  
Outstanding borrowings under credit facility     $ 10,000 $ 10,000
Maturity date May 31, 2020      
First Tennessee Bank National Association ("First Tennessee") | Credit Facility | Minimum        
Line of Credit Facility [Line Items]        
Non-usage fee for current loan agreement in annual amount percentage     0.15%  
First Tennessee Bank National Association ("First Tennessee") | Credit Facility | Maximum        
Line of Credit Facility [Line Items]        
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 | €   € 1,000    
Maturity date   Sep. 30, 2020    
Interest rate per annum   0.30%    
Outstanding borrowings under loan agreement     $ 877 606
Long-term obligations     488 212
Long-term obligations due within one year     $ 389 $ 394