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MARKETABLE SECURITIES - Schedule of Current Available-for-Sale Marketable Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Schedule of Available-for-sale Marketable Securities    
Amortized Cost $ 4,990 $ 4,995
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Available-for-sale marketable debt securities 4,990 4,995
Commercial paper    
Schedule of Available-for-sale Marketable Securities    
Amortized Cost 4,990 4,995
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Available-for-sale marketable debt securities $ 4,990 $ 4,995