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Note 1 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 27, 2025

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		September 27,				December 28,
		2025				2024
Raw materials and purchased parts		$	89,243			$	94,970
Work in process			23,138				25,833
Finished goods			21,865				21,058
Total inventories		$	134,246			$	141,861

Property, Plant and Equipment [Table Text Block]

		September 27,				December 28,
		2025				2024
Land and land improvements		$	12,308			$	6,941
Buildings and building improvements			48,849				47,733
Machinery and equipment			105,212				104,767
			166,369				159,441
Less accumulated depreciation and amortization			(89,247	)			(84,655	)
Property, plant and equipment, net		$	77,122			$	74,786

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

		Three Months Ended								Nine Months Ended
		September 27,				September 28,				September 27,				September 28,
		2025				2024				2025				2024
Cost of sales		$	341			$	270			$	1,064			$	759
Research and development			1,356				765				4,089				2,600
Selling, general and administrative			3,962				4,213				12,411				12,100
Total share-based compensation			5,659				5,248				17,564				15,459
Income tax effect			98				12				(293	)			223
Total share-based compensation, net		$	5,757			$	5,260			$	17,271			$	15,682

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Three Months Ended								Nine Months Ended
		September 27,				September 28,				September 27,				September 28,
		2025				2024				2025				2024
Weighted average common shares			46,748				46,815				46,685				46,971
Effect of dilutive securities			-				-				-				-
			46,748				46,815				46,685				46,971

Disaggregation of Revenue [Table Text Block]

		Three Months Ended								Nine Months Ended
Disaggregated Net Sales		September 27, 2025				September 28, 2024				September 27, 2025				September 28, 2024
Systems		$	56,245			$	31,102			$	131,530			$	103,685
Non-systems			70,004				64,240				199,196				203,972
Total net sales		$	126,249			$	95,342			$	330,726			$	307,657

		Three Months Ended								Nine Months Ended
Disaggregated Net Sales		September 27, 2025				September 28, 2024				September 27, 2025				September 28, 2024
Taiwan		$	23,369			$	3,533			$	52,237			$	14,964
Philippines			20,416				10,451				49,405				32,001
China			14,162				12,770				45,261				43,586
Malaysia			12,397				12,223				41,406				42,913
United States			15,139				16,512				31,883				48,327
Singapore			9,873				9,051				20,008				34,044
Rest of the World			30,893				30,802				90,526				91,822
Total net sales		$	126,249			$	95,342			$	330,726			$	307,657

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Three Months Ended

Nine Months Ended

September 27,

September 28,

September 27,

September 28,

2025

2024

2025

2024

Customers individually representing more than 10% of net sales

three

one

one

*

Percentage of net sales

34%

12%

10%

*

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