Annual report pursuant to Section 13 and 15(d)

INTANGIBLE ASSETS, NET, AND GOODWILL (Narrative) (Details)

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INTANGIBLE ASSETS, NET, AND GOODWILL (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Write-off of abandoned patents $ 145 $ 96
Amortization of intangible assets $ 115 $ 136
Patents | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Useful life 17 years  
Patents | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Useful life 20 years  
STI | Patents | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Useful life 1 year  
STI | Patents | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Useful life 11 years  
STI | Domain name    
Finite-Lived Intangible Assets [Line Items]    
Useful life 10 years  
GVR Trade S.A. | Patents | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Useful life 3 years  
GVR Trade S.A. | Patents | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Useful life 5 years