v3.25.4
Summary of Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Mar. 04, 2021
USD ($)
Oct. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
CompensationPlan
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Feb. 01, 2019
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CNY (¥)
Significant Accounting Policies [Line Items]                      
Net Assets     $ 9,000,000                
Gain (loss) on fair value hedges recognized in earnings     0     $ (261,000) $ (158,000)        
Other than Temporary Impairment Losses, Investments           13,588,000          
Revenue from Contract with Customer, Excluding Assessed Tax     $ 4,990,000                
Estimated useful life of the real estate property held for sales type lease     37 years                
Cash and cash equivalents     $ 26,861,000 $ 8,337,000 $ 21,632,000 56,791,000 60,980,000        
Restricted cash, including security cash deposit     700,000 800,000 1,100,000 1,200,000 1,200,000        
Security cash deposit     3,500,000 13,300,000 22,900,000 17,900,000 900,000        
Short term investment     0 30,796,000 32,406,000 32,406,000 150,150,000        
Accounts Receivable, Related Parties     6,100,000 5,900,000 5,800,000 5,300,000 4,000,000        
Amounts receivable allowance incurred     $ 0 0 0 0 0        
Lease of lands, maximum term     50 years                
Impairment of real estate recognized     $ 0 0 0 0 0        
Impairment loss on long-lived assets       0              
Advertising and promotion expenses     $ 3,900,000 3,700,000 2,760,000 1,300,000 1,370,000 $ 320,000      
Number of stock-based employee compensation plans | CompensationPlan     2                
Maximum insurance coverage for deposits and foreign currency deposits                   $ 76,787,000 ¥ 500,000
Amount covered by deposit insurance regulation     $ 600,000 600,000 600,000 900,000 2,000,000        
Concentration of Credit Risk                      
Significant Accounting Policies [Line Items]                      
Cash and cash equivalents     $ 11,700,000 $ 7,000,000 $ 17,500,000 $ 55,900,000 29,700,000        
Buildings                      
Significant Accounting Policies [Line Items]                      
Estimated useful lives                 47 years 20 years 20 years
Maximum                      
Significant Accounting Policies [Line Items]                      
Lease term percentage of remaining economic life of underlying asset     75.00%                
Lease term of minimum lease payments percentage of fair value of underlying asset     90.00%                
Maximum | Buildings                      
Significant Accounting Policies [Line Items]                      
Estimated useful lives     47 years                
Towers 8 to 10 of Nam Tai Inno Park                      
Significant Accounting Policies [Line Items]                      
Cost of towers transferred             53,700,000        
Cost of towers recognized             21,800,000        
Tower 2                      
Significant Accounting Policies [Line Items]                      
Cost of towers recognized             $ 1,900,000        
One Customer [Member] | One Customer | Accounts Receivable                      
Significant Accounting Policies [Line Items]                      
Concentration risk percentage     15.00% 16.00% 17.00% 18.00% 53.00%        
Dongguan [Member]                      
Significant Accounting Policies [Line Items]                      
Impairment loss on long-lived assets         $ 29,500,000 $ 22,400,000          
Tang Xi and Shanghai [Member]                      
Significant Accounting Policies [Line Items]                      
Impairment loss on long-lived assets           8,700,000          
Shenzhen [Member]                      
Significant Accounting Policies [Line Items]                      
Impairment loss on long-lived assets     $ 3,400,000                
Investment, Identifier [Axis]: Supply Chain Fund                      
Significant Accounting Policies [Line Items]                      
Gain (loss) on fair value hedges recognized in earnings $ 13,300,000                    
Other than Temporary Impairment Losses, Investments 13,600,000                    
Short Term Investments Redeemed $ 104,500,000                    
Proceeds from Collection of Other Receivables   $ 136,900,000                  
Realized Investment Gains (Losses)   $ 13,100,000                  
Peoples Republic of China Court [Member]                      
Significant Accounting Policies [Line Items]                      
Security cash deposit     $ 2,200,000 $ 200,000 2,000,000 400,000          
High Court of Justice of the British Virgin Islands of the Eastern Caribbean Supreme Court [Member]                      
Significant Accounting Policies [Line Items]                      
Security cash deposit       $ 91,200,000 $ 90,300,000 $ 92,900,000