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LONG-TERM INVESTMENTS - Schedule of Long Term Investments (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2023
CNY (¥)
Aug. 17, 2022
USD ($)
Jun. 27, 2019
USD ($)
Long-Term Investment [Line Items]            
Investment - equity method $ 46,218 $ 20,544        
Equity investments without readily determinable fair value using the measurement alternative 10,114 11,153        
Available-for-sale debt investments 9,703 5,366        
Long-term investments (note 11) 66,035 37,063        
Ninebell Co., Ltd (“Ninebell”)            
Long-Term Investment [Line Items]            
Investment - equity method 31,310 7,862        
Hefei Shixi Chanheng Integrated Circuit Industry Venture Capital Fund Partnership (LP) (“Hefei Shixi”)            
Long-Term Investment [Line Items]            
Investment - equity method 5,335 4,798        
Shengyi Semiconductor Technology Co., Ltd. ("Shengyi")            
Long-Term Investment [Line Items]            
Investment - equity method 4,411 2,775 $ 900 ¥ 6,100   $ 109
Company A            
Long-Term Investment [Line Items]            
Investment - equity method 4,269 4,173        
Wooil Flucon Co., ("Wooil")            
Long-Term Investment [Line Items]            
Investment - equity method $ 893 $ 936     $ 1,000