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Note 1 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 28, 2024

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		September 28,				December 30,
		2024				2023
Raw materials and purchased parts		$	95,961			$	103,118
Work in process			25,572				26,820
Finished goods			22,592				25,855
Total inventories		$	144,125			$	155,793

Property, Plant and Equipment [Table Text Block]

		September 28,				December 30,
		2024				2023
Land and land improvements		$	7,372			$	7,301
Buildings and building improvements			47,963				39,677
Machinery and equipment			107,230				108,831
			162,565				155,809
Less accumulated depreciation and amortization			(85,899	)			(86,724	)
Property, plant and equipment, net		$	76,666			$	69,085

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

		Three Months Ended								Nine Months Ended
		September 28,				September 30,				September 28,				September 30,
		2024				2023				2024				2023
Cost of sales		$	270			$	223			$	759			$	619
Research and development			765				849				2,600				2,534
Selling, general and administrative			4,213				3,262				12,100				9,527
Total share-based compensation			5,248				4,334				15,459				12,680
Income tax effect			12				(45	)			223				(2,883	)
Total share-based compensation, net		$	5,260			$	4,289			$	15,682			$	9,797

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

		Three Months Ended								Nine Months Ended
		September 28,				September 30,				September 28,				September 30,
		2024				2023				2024				2023
Weighted average common shares			46,815				47,615				46,971				47,525
Effect of dilutive securities			-				492				-				577
			46,815				48,107				46,971				48,102

Disaggregation of Revenue [Table Text Block]

		Three Months Ended								Nine Months Ended
Disaggregated Net Sales		September 28, 2024				September 30, 2023				September 28, 2024				September 30, 2023
Systems		$	31,102			$	73,173			$	103,685			$	263,469
Non-systems			64,240				77,631				203,972				235,627
Total net sales		$	95,342			$	150,804			$	307,657			$	499,096

		Three Months Ended								Nine Months Ended
Disaggregated Net Sales		September 28, 2024				September 30, 2023				September 28, 2024				September 30, 2023
United States		$	16,512			$	23,604			$	48,327			$	58,097
China			12,770				19,689				43,586				69,193
Malaysia			12,223				23,550				42,913				78,703
Singapore			9,051				13,693				34,044				38,387
Philippines			10,451				19,983				32,001				77,132
Rest of the World			34,335				50,285				106,786				177,584
Total net sales		$	95,342			$	150,804			$	307,657			$	499,096

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

Three Months Ended

Nine Months Ended

September 28,

September 30,

September 28,

September 30,

2024

2023

2024

2023

Customers individually accounting for more than 10% of net sales

one

two

*

one

Percentage of net sales

12%

22%

*

13%

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