CONCENTRATION OF RISK - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Concentration Risk [Line Items]
Total revenue	$ 160,432	$ 139,613	$ 454,800	$ 477,684
South Korea [Member]
Concentration Risk [Line Items]
Total revenue	101,263	103,069	281,843	276,924
China [Member]
Concentration Risk [Line Items]
Total revenue	52,440	32,161	155,173	179,173
Japan [Member]
Concentration Risk [Line Items]
Total revenue	1,828	383	2,410	2,497
Other Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Total revenue	371	223	1,025	1,211
Total Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Total revenue	155,902	135,836	440,451	459,805
United States [Member]
Concentration Risk [Line Items]
Total revenue	$ 4,530	$ 3,777	$ 14,349	$ 17,879

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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