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CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
Sep. 30, 2018
USD ($)
item
Sep. 30, 2017
Dec. 31, 2017
Major customers and concentration of credit risk          
Cash | $ $ 397   $ 397    
Largest customer          
Major customers and concentration of credit risk          
Number of divisions | item     2    
China          
Major customers and concentration of credit risk          
Cash | $ $ 395   $ 395    
Credit concentration risk          
Major customers and concentration of credit risk          
Excess cash balance, number of high credit quality financial institutions | item     2    
Net sales | Customer concentration risk          
Major customers and concentration of credit risk          
Percentage of export sales to consolidated net sales 20.00% 18.00% 19.00% 16.00%  
Net sales | Customer concentration risk | Largest customer          
Major customers and concentration of credit risk          
Percentage of concentration risk (as a percent) 10.00% 10.00% 10.00% 10.00%  
Net sales | Customer concentration risk | Division one of largest customer          
Major customers and concentration of credit risk          
Percentage of concentration risk (as a percent) 20.00% 23.00% 20.00% 20.00%  
Net sales | Customer concentration risk | Other division of largest customer          
Major customers and concentration of credit risk          
Percentage of concentration risk (as a percent) 1.00% 1.00% 1.00% 2.00%  
Net sales | Customer concentration risk | Divisions one & other          
Major customers and concentration of credit risk          
Percentage of concentration risk (as a percent) 21.00% 24.00% 21.00% 26.00%  
Accounts receivable | Customer concentration risk | Largest customer          
Major customers and concentration of credit risk          
Percentage of concentration risk (as a percent)     21.00%   16.00%