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INTANGIBLE ASSETS (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Jul. 31, 2007
Intangible assets      
Useful life 15 years    
Accumulated amortization $ (183) $ (174)  
Intangible assets, net 17 26  
BCH License [Member]      
Intangible assets      
Intangible assets - gross 200 200 $ 75
Patent licensing fee      
Intangible assets      
Intangible assets - gross $ 200 $ 200