v3.25.4
Income Tax - Reconciliation of the Effective Income Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
$      
PRC Statutory income tax benefit $ (44,615)    
Effective income tax benefit $ (2,927) $ 0 $ 0
%      
PRC Statutory income tax rate 25.00% 25.00% 25.00%
Share-based compensation   (3.52%) (2.08%)
Expiration of deductible qualified donation   (0.78%) 2.28%
Research and development super deduction   5.28% 7.11%
Preferential tax rate   (5.05%) (7.12%)
Changes in valuation allowance   (14.08%) (23.89%)
Offshore income   0.42% 0.19%
Foreign tax effects   (0.73%) 0.02%
Non-deductible expenses   (0.77%) (2.83%)
Prior year tax filing adjustment   (3.05%) 1.32%
Expiration of tax loss   (2.72%) 0.00%
Effective income tax rate 1.64% 0.00% 0.00%
Mainland China      
$      
Share-based compensation $ 5,049    
Expiration of deductible qualified donation 8,447    
Other nontaxable or nondeductible items 1,220    
Research and development super deduction (12,498)    
Preferential tax rate 6,022    
Intercompany inventory profit deferral 3,205    
Other adjustments 1,672    
Changes in valuation allowance $ 3,953    
%      
Share-based compensation (2.83%)    
Expiration of deductible qualified donation (4.73%)    
Other non-deductible expenses (0.68%)    
Research and development super deduction 7.00%    
Preferential tax rate (3.37%)    
Intercompany inventory profit deferral (1.80%)    
Other adjustments (0.94%)    
Changes in valuation allowance (2.21%)    
United States      
$      
Share-based compensation $ (5,153)    
Other adjustments 10    
Changes in valuation allowance 27,980    
Non-deductible compensation 2,543    
Effect of different tax rate of subsidiary operation $ 4,834    
%      
Share-based compensation 2.89%    
Other adjustments (0.01%)    
Changes in valuation allowance (15.68%)    
Non-deductible compensation (1.43%)    
Effect of different tax rate of subsidiary operation (2.71%)    
Hong Kong      
$      
Other nontaxable or nondeductible items $ 2,982    
Other adjustments (241)    
Offshore income $ (6,649)    
%      
Other non-deductible expenses (1.67%)    
Other adjustments 0.13%    
Offshore income 3.73%    
Cayman      
$      
Foreign tax effects $ (1,688)    
%      
Foreign tax effects 0.95%