REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 33,886	$ 26,637
Semi
Disaggregation of Revenue [Line Items]
Revenue	10,507	8,995
Auto/EV
Disaggregation of Revenue [Line Items]
Revenue	7,487	5,959
Defense/Aerospace
Disaggregation of Revenue [Line Items]
Revenue	5,822	2,828
Industrial
Disaggregation of Revenue [Line Items]
Revenue	3,242	3,021
Life Sciences
Disaggregation of Revenue [Line Items]
Revenue	3,572	1,688
Safety/Security
Disaggregation of Revenue [Line Items]
Revenue	1,112	564
Other
Disaggregation of Revenue [Line Items]
Revenue	2,144	3,582
Thermal test
Disaggregation of Revenue [Line Items]
Revenue	6,766	4,393
Thermal process
Disaggregation of Revenue [Line Items]
Revenue	5,625	5,281
Semiconductor test
Disaggregation of Revenue [Line Items]
Revenue	5,507	4,734
Video imaging
Disaggregation of Revenue [Line Items]
Revenue	2,058	2,057
Flying probe and in-circuit testers
Disaggregation of Revenue [Line Items]
Revenue	2,047	1,856
Alfamation™ products
Disaggregation of Revenue [Line Items]
Revenue	7,120	4,149
Service/other
Disaggregation of Revenue [Line Items]
Revenue	4,763	4,167
End user
Disaggregation of Revenue [Line Items]
Revenue	28,320	22,436
OEM/Integrator
Disaggregation of Revenue [Line Items]
Revenue	$ 5,566	$ 4,201