Quarterly report pursuant to Section 13 or 15(d)

SEGMENTS AND GEOGRAPHIC INFORMATION (Details)

v3.21.2
SEGMENTS AND GEOGRAPHIC INFORMATION (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
segment
Sep. 30, 2020
USD ($)
Segment Reporting Information [Line Items]        
Number of operating segments | segment     1  
Revenues $ 425 $ 1,405 $ 1,647 $ 2,553
Japan        
Segment Reporting Information [Line Items]        
Revenues 226 1,248 1,168 2,271
China        
Segment Reporting Information [Line Items]        
Revenues 95 150 270 257
Other        
Segment Reporting Information [Line Items]        
Revenues $ 104 $ 7 $ 209 $ 25