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SEGMENT INFORMATION - Segment Reporting Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenue | $ 28,130 |  | $ 33,991 |  | $ 54,767 | $ 63,815 |
Cost of revenue | 16,157 |  | 20,194 |  | 31,738 | 36,942 |
Other divisional costs | 9,403 |  | 10,091 |  | 19,826 | 19,378 |
Division operating income (loss) | 2,570 |  | 3,706 |  | 3,203 | 7,495 |
Amortization of acquired intangible assets | 850 |  | 897 |  | 1,663 | 1,492 |
Restructuring costs | 216 |  | 0 |  | 529 | 0 |
Corporate expenses | 2,431 |  | 2,473 |  | 4,819 | 5,175 |
Operating (loss) income | (927) |  | 336 |  | (3,808) | 828 |
Interest expense | (119) |  | (253) |  | (271) | (393) |
Other income | 463 |  | 213 |  | 707 | 648 |
(Loss) earnings before income tax (benefit) expense | (583) |  | 296 |  | (3,372) | 1,083 |
Depreciation | 314 |  | 356 |  | 630 | 629 |
Amortization of deferred compensation related to stock-based awards | 435 | $ 423 | 564 | $ 349 | 858 | 913 |
Capital expenditures | 462 |  | 316 |  | 691 | 656 |
Total assets | 149,653 |  | 160,554 |  | 149,653 | 160,554 | $ 152,288
Corporate & Other |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Amortization of acquired intangible assets | 850 |  | 897 |  | 1,663 | 1,492 |
Restructuring costs | 216 |  |  |  | 529 |  |
Corporate expenses | 2,431 |  | 2,473 |  | 4,819 | 5,175 |
Operating (loss) income | (3,497) |  | (3,370) |  | (7,011) | (6,667) |
Interest expense | (119) |  | (253) |  | (271) | (393) |
Other income | 463 |  | 213 |  | 707 | 648 |
(Loss) earnings before income tax (benefit) expense | (3,153) |  | (3,410) |  | (6,575) | (6,412) |
Depreciation | 39 |  | 22 |  | 74 | 43 |
Amortization of deferred compensation related to stock-based awards | 200 |  | 411 |  | 549 | 687 |
Capital expenditures | 366 |  | 71 |  | 373 | 76 |
Total assets | 1,475 |  | 1,599 |  | 1,475 | 1,599 |
Electronic Test | Operating Segments |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenue | 13,733 |  | 16,159 |  | 26,992 | 27,275 |
Cost of revenue | 7,418 |  | 9,462 |  | 14,731 | 15,008 |
Other divisional costs | 4,755 |  | 4,954 |  | 10,020 | 8,711 |
Division operating income (loss) | 1,560 |  | 1,743 |  | 2,241 | 3,556 |
Operating (loss) income | 1,560 |  | 1,743 |  | 2,241 | 3,556 |
(Loss) earnings before income tax (benefit) expense | 1,560 |  | 1,743 |  | 2,241 | 3,556 |
Depreciation | 152 |  | 154 |  | 306 | 242 |
Amortization of deferred compensation related to stock-based awards | 86 |  | 53 |  | 140 | 106 |
Capital expenditures | 63 |  | 106 |  | 197 | 142 |
Total assets | 76,259 |  | 81,668 |  | 76,259 | 81,668 |
Environmental Technologies | Operating Segments |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenue | 7,215 |  | 8,273 |  | 13,483 | 15,101 |
Cost of revenue | 4,534 |  | 5,016 |  | 8,697 | 9,549 |
Other divisional costs | 2,070 |  | 2,264 |  | 4,430 | 4,544 |
Division operating income (loss) | 611 |  | 993 |  | 356 | 1,008 |
Operating (loss) income | 611 |  | 993 |  | 356 | 1,008 |
(Loss) earnings before income tax (benefit) expense | 611 |  | 993 |  | 356 | 1,008 |
Depreciation | 62 |  | 80 |  | 127 | 144 |
Amortization of deferred compensation related to stock-based awards | 81 |  | 48 |  | 49 | 86 |
Capital expenditures | 24 |  | 122 |  | 106 | 351 |
Total assets | 21,944 |  | 21,827 |  | 21,944 | 21,827 |
Process Technologies | Operating Segments |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Revenue | 7,182 |  | 9,559 |  | 14,292 | 21,439 |
Cost of revenue | 4,205 |  | 5,716 |  | 8,310 | 12,385 |
Other divisional costs | 2,578 |  | 2,873 |  | 5,376 | 6,123 |
Division operating income (loss) | 399 |  | 970 |  | 606 | 2,931 |
Operating (loss) income | 399 |  | 970 |  | 606 | 2,931 |
(Loss) earnings before income tax (benefit) expense | 399 |  | 970 |  | 606 | 2,931 |
Depreciation | 61 |  | 100 |  | 123 | 200 |
Amortization of deferred compensation related to stock-based awards | 68 |  | 52 |  | 120 | 34 |
Capital expenditures | 9 |  | 17 |  | 15 | 87 |
Total assets | $ 49,975 |  | $ 55,460 |  | $ 49,975 | $ 55,460 |

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