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REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 USD ($) category | Mar. 31, 2025 USD ($) | Dec. 31, 2025
Concentration Risk [Line Items] |  |  |
Number of application categories | category | 2 |  |
Net sales | $ 265,497 | $ 227,793 |
Number of product categories | category | 2 |  |
Revenue recognized that was included in the contract liability balance at the beginning of the period | $ 27,410 | 21,214 |
One Customer | Customer Concentration Risk | Accounts Receivable |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 12.00% |  | 11.00%
Advanced Solutions |  |  |
Concentration Risk [Line Items] |  |  |
Net sales | $ 37,907 | 39,777 |
Advanced Solutions | Revision of Prior Period, Reclassification Adjustment Increase (Decrease) |  |  |
Concentration Risk [Line Items] |  |  |
Net sales |  | 7,702 |
Industrial Solutions |  |  |
Concentration Risk [Line Items] |  |  |
Net sales | 227,590 | 188,016 |
Industrial Solutions | Revision of Prior Period, Reclassification Adjustment Increase (Decrease) |  |  |
Concentration Risk [Line Items] |  |  |
Net sales |  | (7,702) |
Lasers and Components |  |  |
Concentration Risk [Line Items] |  |  |
Net sales | 213,652 | 187,343 |
Lasers and Components | Revision of Prior Period, Reclassification Adjustment Increase (Decrease) |  |  |
Concentration Risk [Line Items] |  |  |
Net sales |  | 45,977 |
Systems |  |  |
Concentration Risk [Line Items] |  |  |
Net sales | $ 51,845 | 40,450 |
Systems | Revision of Prior Period, Reclassification Adjustment Increase (Decrease) |  |  |
Concentration Risk [Line Items] |  |  |
Net sales |  | 7,397 |
Other Revenue | Revision of Prior Period, Reclassification Adjustment to Lasers and Components |  |  |
Concentration Risk [Line Items] |  |  |
Net sales |  | (45,977) |
Other Revenue | Revision of Prior Period, Reclassification Adjustment to Systems |  |  |
Concentration Risk [Line Items] |  |  |
Net sales |  | $ (7,397) |

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