v3.26.3
Summary of Significant Accounting Policies (Details)
¥ in Thousands, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
CNY (¥)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Summary of Significant Accounting Policies [Line Items]        
Written down amount   $ 1,119   $ 1,043
Accounts receivable   55,127   50,643
Advance from customer   670   524
Restricted cash   14,857   31,630
Recognized revenue   $ 139 $ 230  
Subsidiaries [Member]        
Summary of Significant Accounting Policies [Line Items]        
Equity ownership interest rate percent   100.00%    
China [Member]        
Summary of Significant Accounting Policies [Line Items]        
Cash equivalent value   $ 9,966   $ 22,279
Maximum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Bank account is insured by the government ¥ 500 73    
Minimum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Bank account is insured by the government   $ 150    
Supplier Concentration Risk [Member] | Customer A [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk 13.90% 13.90%    
Supplier Concentration Risk [Member] | Supplier A [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk 13.40% 13.40% 1.80%  
Supplier Concentration Risk [Member] | Supplier B [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk 4.60% 4.60% 15.90%  
Supplier Concentration Risk [Member] | Supplier C [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk 9.90% 9.90% 8.70%  
Supplier Concentration Risk [Member] | Maximum [Member] | Customer A [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk 22.70% 22.70%    
Supplier Concentration Risk [Member] | Maximum [Member] | Customer B [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk 19.20% 19.20%    
Supplier Concentration Risk [Member] | Minimum [Member] | Customer A [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk       10.60%
Supplier Concentration Risk [Member] | Minimum [Member] | Customer B [Member] | Revenue Benchmark [Member]        
Summary of Significant Accounting Policies [Line Items]        
Concentration of risk       14.00%