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CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY - Condensed statements of cash flows (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY      
Net decrease in cash and cash equivalents $ (390) $ (1,467) $ (2,297)
Cash and cash equivalents at beginning of the year 1,810 3,244  
Cash and cash equivalents at end of the year 1,420 1,810 3,244
Parent Company      
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY      
Net cash used in operating activities (10,715) (2,062) (2,472)
Net cash provided by investing activities     2,370
Net cash provided by financing activities 10,694 2,057  
Net decrease in cash and cash equivalents (21) (5) (102)
Cash and cash equivalents at beginning of the year 30 35 137
Cash and cash equivalents at end of the year $ 9 $ 30 $ 35