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PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Cost $ 7,119 $ 7,219  
Accumulated depreciation 5,408 4,881  
Depreciated cost 1,711 2,338  
Depreciation 715 989 $ 1,394
Computers, software and related equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost 1,431 1,365  
Accumulated depreciation 1,264 1,152  
Laboratory equipment and office furniture [Member]      
Property, Plant and Equipment [Line Items]      
Cost 3,367 3,538  
Accumulated depreciation 3,001 2,821  
Leasehold improvements [Member]      
Property, Plant and Equipment [Line Items]      
Cost 2,321 2,316  
Accumulated depreciation 1,143 908  
Obsolete property and equipment and certain nonfunctional Lab equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost 220 2,698  
Accumulated depreciation $ 188 $ 2,451