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CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Condensed Statements of Cash Flows (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES      
Net cash provided by (used in) operating activities $ (20,754) $ (29,224) $ (19,967)
CASH FLOWS FROM INVESTING ACTIVITIES      
Proceeds from sales of equity securities 2,604 467  
Proceeds from sale of intangible assets   500  
Proceeds from extinguishment of investment in a convertible loan     1,000
Purchases of property, plant and equipment (16) (223) (204)
Purchases of intangible asset (13) (17) (2,037)
Net cash provided by (used in) investing activities 951 11,244 (9,673)
CASH FLOWS FROM FINANCING ACTIVITIES      
Repurchase of ordinary share     (278)
Payment of share issuance costs (681) (960)  
Proceeds from issuance of convertible notes 5,000    
Proceeds from issuance of ordinary shares 5,878 15,000  
Proceeds from exercise of share options 56 2,112 109
Net cash provided by (used in) financing activities 11,254 15,434 (907)
Net decrease in cash and cash equivalents (7,836) (3,615) (30,029)
Cash and cash equivalents at beginning of year 13,468 17,083 47,112
Cash and cash equivalents at end of year 5,632 13,468 17,083
Parent Company      
CASH FLOWS FROM OPERATING ACTIVITIES      
Net cash provided by (used in) operating activities (20,537) (23,437) 5,574
CASH FLOWS FROM INVESTING ACTIVITIES      
Proceeds from sales of equity securities 2,604 467  
Proceeds from sale of intangible assets   500  
Proceeds from extinguishment of investment in a convertible loan     1,000
Purchases of property, plant and equipment     (13)
Purchases of intangible asset     (2,000)
Investment in subsidiaries     (1,000)
Net cash provided by (used in) investing activities 2,604 967 (2,013)
CASH FLOWS FROM FINANCING ACTIVITIES      
Repurchase of ordinary share     (278)
Payment of share issuance costs (681) (960)  
Proceeds from issuance of convertible notes 5,000    
Proceeds from issuance of ordinary shares 5,878 15,000  
Proceeds from exercise of share options 56 2,112 109
Net cash provided by (used in) financing activities 10,253 16,152 (169)
Net decrease in cash and cash equivalents (7,680) (6,318) 3,392
Cash and cash equivalents at beginning of year 9,162 15,480 12,088
Cash and cash equivalents at end of year $ 1,482 $ 9,162 $ 15,480