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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 26,637 | $ 29,824
Semi |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 8,995 | 14,967
Auto/EV |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 5,959 | 3,958
Defense/Aerospace |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 2,828 | 3,239
Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 3,021 | 4,187
Life Sciences |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,688 | 653
Safety/Security |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 564 | 541
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 3,582 | 2,279
Thermal test |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 4,393 | 3,699
Thermal process |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 5,281 | 10,955
Semiconductor test |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 4,734 | 6,282
Video imaging |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 2,057 | 2,119
Flying probe and in-circuit testers |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,856 | 2,744
Alfamation |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 4,149 | 1,379
Service/other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 4,167 | 2,646
End user |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 22,436 | 21,430
OEM/Integrator |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 4,201 | $ 8,394

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