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STOCK-BASED COMPENSATION PLANS (Details 1) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summary of stock option activity under the option Plan      
Weighted Average Remaining Contractual Life, Exercisable at December 30, 2017 5 years 4 months 10 days    
2005 and 2017 Stock Plans [Member]      
Summary of stock option activity under the option Plan      
Balance Beginning 2,231 1,685  
Number of Shares, Granted 662 877  
Number of Shares, Exercised (38) (1)  
Number of Shares, Forfeited (803) (330)  
Balance Ending 2,052 2,231  
Number of Shares, Exercisable at December 30, 2017 1,460    
Weighted Average Exercise Price, Outstanding Beginning $ 0.40 $ 0.46  
Weighted Average Exercise Price, Granted 0.86 0.26  
Weighted Average Exercise Price, Exercised 1.02 0.15  
Weighted Average Exercise Price, Forfeited 0.33 0.36  
Weighted Average Exercise Price, Outstanding Ending 0.56 $ 0.40  
Weighted Average Exercise Price, Exercisable at December 30, 2017 $ 0.4    
Weighted Average Remaining Contractual Life, Outstanding at December 30, 2016 6 years 6 months 6 years 8 months 12 days  
Weighted Average Remaining Contractual Life, Outstanding at December 30, 2017 6 years 6 months 6 years 8 months 12 days  
Weighted Average Remaining Contractual Life, Exercisable at December 30, 2017 5 years 3 months 18 days    
Aggregate Intrinsic Value, Outstanding at December 30, 2016 $ 5,334 $ 135 $ 235