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SEGMENT REPORTING
 3 Months Ended
Mar. 31, 2026
Segment Reporting [Abstract]  
SEGMENT REPORTING SEGMENT REPORTING
The Company operates in one segment which involves the design, development, production and distribution of fiber lasers, laser and non-laser systems, fiber amplifiers, and related optical components. The Company has a single, company-wide management team that administers the enterprise as a whole rather than as discrete operating segments. The chief operating decision maker ("CODM"), who is the Company's chief executive officer, also measures financial performance as a single enterprise, and not on geography, legal entity, or end market basis. Throughout the year, the CODM allocates capital resources on a project-by-project basis across the Company's entire asset base, as reflected in the Company's Condensed Consolidated Balance Sheets, to maximize profitability without regard to geography, legal entity, or end market basis. The Company operates in a number of countries throughout the world in a variety of product lines. Information regarding product lines and geographic financial information is provided in Note 3, "Revenue from Contracts with Customers."
The CODM primarily utilizes "Net income" as well as "Net income per common share” included in the Company's Condensed Consolidated Statements of Operations as the key indicators in assessing the enterprise’s performance and allocating resources. In evaluating Net income, the CODM also reviews gross profit as well the Company's income before foreign exchange and other segment items to set and evaluate performance targets.
The following table presents the break-down of Net income, including significant segment expenses.
 Three Months Ended March 31,
 20262025
 (In thousands, except per share data)
Net sales$265,497 $227,793 
Cost of product sold and other expenses (a)
125,807 103,332 
Manufacturing, service and other operations salaries, bonus, and benefits, including contractor costs78,403 65,147 
Other manufacturing expenses (b)
36,836 30,866 
Capitalized labor and overhead(75,048)(61,364)
Cost of sales165,998 137,981 
Gross profit99,499 89,812 
Sales and marketing, research and development and general and administrative (c)
93,935 85,574 
Income before foreign exchange and other segment items
5,564 4,238 
Gain (loss) on foreign exchange
200 (2,411)
Interest income, net
6,922 7,444 
Provision for income taxes
565 (6,857)
Other segment items (d)
(11,667)1,344 
Net income
$1,584 $3,758 
(a) Includes cost of materials, labor and overhead, shipping costs, scrap, and inventory reserves.
(b) Includes depreciation and amortization, service, warranty, and other manufacturing expenses.
(c) Sales and marketing, research and development and general and administrative expenses are disclosed by period in the Company's Condensed Consolidated Statements of Operations.
(d) Other segment items includes settlement of litigation matters and other income, net.