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PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Cost $ 7,219 $ 9,715  
Accumulated depreciation 4,881 6,343  
Depreciated cost 2,338 3,372  
Depreciation 989 1,394 $ 1,593
Computers, software and related equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost 1,365 1,371  
Accumulated depreciation 1,152 1,166  
Laboratory equipment and office furniture [Member]      
Property, Plant and Equipment [Line Items]      
Cost 3,538 5,808  
Accumulated depreciation 2,821 4,247  
Leasehold improvements [Member]      
Property, Plant and Equipment [Line Items]      
Cost 2,316 2,536  
Accumulated depreciation 908 930  
Obsolete property and equipment and certain nonfunctional Lab equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost 2,698 87  
Accumulated depreciation $ 2,451 $ 33