v3.26.1
INCOME TAXES - Reconciliation of Income Tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reconciliation between the expense of income taxes computed by applying the PRC tax rate to loss before income taxes and the actual provision for income taxes      
Loss before income tax   $ (2,528) $ (9,550)
Income tax calculated at the statutory tax rate of the PRC $ 2,055 (632) (2,387)
Effect of income tax rate differences in jurisdictions other than the PRC   468 1,151
Non-deductible expenses   77 129
Statutory expense   (101) (293)
R&D super deduction (724) (1,700) (2,904)
Effect of preferential tax rates   50 (86)
Prior year true up   88 (71)
Changes in valuation allowances   1,711 4,501
Income tax expense / (benefit) $ (61) $ (39) $ 40
Tax Jurisdiction of Domicile [Extensible Enumeration] PRC    
Percent      
Income tax calculated at the statutory tax rate of the PRC (as a percent) 25.00% 25.00% 25.00%
R&D super deduction (8.80%)    
Income tax benefit (0.70%)    
PRC      
Reconciliation between the expense of income taxes computed by applying the PRC tax rate to loss before income taxes and the actual provision for income taxes      
Changes in valuation allowances $ 761    
Other adjustment $ 30    
Percent      
Changes in valuation allowance 9.30%    
Other adjustments 0.40%    
Hong Kong      
Reconciliation between the expense of income taxes computed by applying the PRC tax rate to loss before income taxes and the actual provision for income taxes      
Income tax calculated at the statutory tax rate of the PRC $ (563)    
Changes in valuation allowances (1,647)    
Changes in unrecognized tax benefits (107)    
Non-taxable income (348)    
Other adjustment $ 35    
Percent      
Statutory tax rate difference (6.90%)    
Changes in valuation allowance (20.00%)    
Changes in unrecognized tax benefits (1.30%)    
Percentage of effective rate (4.20%)    
Other adjustments 0.40%    
Singapore and other regions      
Reconciliation between the expense of income taxes computed by applying the PRC tax rate to loss before income taxes and the actual provision for income taxes      
Income tax calculated at the statutory tax rate of the PRC $ 359    
Changes in valuation allowances $ 88    
Percent      
Statutory tax rate difference 4.30%    
Changes in valuation allowance 1.10%