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Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 38,465 $ 36,636  
Less: accumulated depreciation (33,827) (31,366)  
Property and equipment, net 49,166 22,708  
Depreciation 3,500 7,100 $ 9,500
Network equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 28,810 27,298  
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 4,994 4,408  
Electronic equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 2,783 3,026  
Furniture, computers and office equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 1,027 1,041  
Self-developed software      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 851 863  
Property and equipment, net 42 42  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property and equipment, net $ 44,486 $ 17,396