INTANGIBLE ASSETS, NET - Aggregate intangible asset amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
INTANGIBLE ASSETS, NET
Total amortization expense	$ 93	$ 112	$ 186	$ 216
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfRevenue
INTANGIBLE ASSETS, NET
Total amortization expense	2	2	4	5
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense
INTANGIBLE ASSETS, NET
Total amortization expense	$ 91	$ 110	$ 182	$ 211

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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+ Details