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Inventories - Schedule (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Inventories [Line Items]    
Less: Impairment $ (3,716) $ (193)
Inventories 5,537 12,667
Hardware Devices [Member]    
Inventories [Line Items]    
Inventories 9,091 12,377
Others [Member]    
Inventories [Line Items]    
Inventories $ 162 $ 483