Annual report pursuant to Section 13 and 15(d)

SEGMENT INFORMATION - Long-live Assets by Geographic Area (Details)

v3.20.1
SEGMENT INFORMATION - Long-live Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]    
Total long-lived assets $ 735 $ 934
United States    
Segment Reporting Information [Line Items]    
Total long-lived assets 379 521
Hong Kong    
Segment Reporting Information [Line Items]    
Total long-lived assets 135 145
China    
Segment Reporting Information [Line Items]    
Total long-lived assets 57 61
Other foreign countries    
Segment Reporting Information [Line Items]    
Total long-lived assets $ 164 $ 207