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SEGMENT REPORTING - Summary of the Company's Segment Net Sales, Gross Profit and Segment Margin (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SEGMENT REPORTING |  |  |  |
Net sales | [1] | $ 10,878 | $ 15,753 | $ 14,052
Cost of Net Sales |  | (7,972) | (11,363) | (11,385)
Gross Profit (Loss) |  | 2,906 | 4,390 | 2,667
Research and Development |  | (5,085) | (5,881) | (4,762)
Loss before income taxes |  | (3,685) | (2,577) | (2,939)
Operating segments | Equipment |  |  |  |
SEGMENT REPORTING |  |  |  |
Net sales |  | 1,406 | 4,594 | 2,284
Cost of Net Sales |  | (1,223) | (3,666) | (2,902)
Gross Profit (Loss) |  | 183 | 928 | (618)
Research and Development |  | (5,085) | (5,881) | (4,762)
Operating segments | Services |  |  |  |
SEGMENT REPORTING |  |  |  |
Net sales |  | 9,472 | 11,159 | 11,768
Cost of Net Sales |  | (6,749) | (7,697) | (8,483)
Gross Profit (Loss) |  | 2,723 | 3,462 | 3,285
General and Corporate |  |  |  |
SEGMENT REPORTING |  |  |  |
General and corporate |  | $ (1,506) | $ (1,086) | $ (844)
[1] | Revenue recognized for the years ended December 31, 2024, 2023 and 2022 that was included in deferred revenue (including current and non-current) and customer advances as of the beginning of each year was $0.1 m illion, $0.1 million and $0.3 million, respectively.

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