LONG-TERM INVESTMENTS - Summary of Long Term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Long-Term Investments [Line Items]
Equity method investments	$ 67,398	$ 46,218
Equity investments without readily determinable fair value using the measurement alternative	11,167	10,114
Available for sale debt securities	10,684	9,703
Total long-term investments	89,249	66,035
Ninebell
Long-Term Investments [Line Items]
Equity method investments	51,467	31,310
Wooil
Long-Term Investments [Line Items]
Equity method investments	949	893
Shengyi
Long-Term Investments [Line Items]
Equity method investments	6,203	4,411
Hefei Shixi
Long-Term Investments [Line Items]
Equity method investments	4,375	5,335
Company A
Long-Term Investments [Line Items]
Equity method investments	$ 4,404	$ 4,269