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THE COMPANY AND ITS SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Thousands
12 Months Ended
Apr. 01, 2016
Feb. 24, 2015
Dec. 31, 2016
USD ($)
segment
Dec. 31, 2015
USD ($)
Stock spilt   2    
Stock dividend (as a percent) 25.00%      
Number of reportable segments | segment     1  
Extended warranty period     1 year  
Cash held in banks, not insured     $ 4,800 $ 3,700
Funds, fully insured     $ 250 250
Minimum        
Estimated useful lives     2 years  
Maximum        
Estimated useful lives     5 years  
China        
Cash held in banks, not insured     $ 639 252
Singapore        
Cash held in banks, not insured     $ 43 $ 92