INTANGIBLE ASSETS, NET - Aggregate intangible asset amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
INTANGIBLE ASSETS, NET
Total amortization expense	$ 111	$ 106	$ 328	$ 313
Cost of goods sold
INTANGIBLE ASSETS, NET
Total amortization expense	2	3	8	8
Research and development
INTANGIBLE ASSETS, NET
Total amortization expense	$ 109	$ 103	$ 320	$ 305

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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+ Details