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Inventories - Schedule (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Inventories [Line Items]    
Less: Impairment $ (470) $ (3,428)
Inventories 1,363 1,726
Hardware Devices [Member]    
Inventories [Line Items]    
Inventories 1,595 4,830
Others [Member]    
Inventories [Line Items]    
Inventories $ 238 $ 324