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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Balance Beginning 2,136    
Shares under option, granted 65 200  
Number of Shares, Exercised 237    
Number of Warrants, Forfeited 6    
Balance Ending 1,958   2,136
Weighted Average Exercise Price, Outstanding Beginning $ 0.54    
Weighted Average Exercise Price, Granted 0 $ 0.21  
Weighted Average Exercise Price, Exercised 0.36    
Weighted Average Exercise Price, Forfeited 1.28    
Weighted Average Exercise Price, Outstanding Ending $ 0.54   $ 0.54
Weighted Average Remaining Contractual Life (Years) 6 years 3 months 7 days   6 years 3 months 22 days
Warrant [Member]      
Balance Beginning 200    
Shares under option, granted 0    
Number of Shares, Exercised 0    
Number of Warrants, Forfeited 0    
Balance Ending 200   200
Weighted Average Exercise Price, Outstanding Beginning $ 1.86    
Weighted Average Exercise Price, Granted 0    
Weighted Average Exercise Price, Exercised 0    
Weighted Average Exercise Price, Forfeited 0    
Weighted Average Exercise Price, Outstanding Ending $ 1.86   $ 1.86
Weighted Average Remaining Contractual Life (Years) 5 years 7 months 13 days   5 years 9 months 18 days
Aggregate Intrinsic Value Exercisable Balance $ 264    
Aggregate Intrinsic Value Exercisable Balance $ 305   $ 264