Note 1 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jul. 01, 2023

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	July 1,		December 31,
	2023		2022
Raw materials and purchased parts	$	108,335	$	106,041
Work in process		35,752		36,024
Finished goods		29,666		28,076
Total inventories	$	173,753	$	170,141

Property, Plant and Equipment [Table Text Block]

	July 1,			December 31,
	2023			2022
Land and land improvements	$	7,069		$	7,066
Buildings and building improvements		32,831			31,161
Machinery and equipment		109,325			105,109
		149,225			143,336
Less accumulated depreciation and amortization		(82,599	)		(78,325	)
Property, plant and equipment, net	$	66,626		$	65,011

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

	Three Months Ended						Six Months Ended
	July 1,			June 25,			July 1,			June 25,
	2023			2022			2023			2022
Cost of sales	$	216		$	172		$	396		$	317
Research and development		819			826			1,685			1,578
Selling, general and administrative		3,397			2,935			6,265			5,460
Total share-based compensation		4,432			3,933			8,346			7,355
Income tax benefit		(62	)		(836	)		(2,838	)		(2,462	)
Total share-based compensation, net	$	4,370		$	3,097		$	5,508		$	4,893

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

	Three Months Ended				Six Months Ended
	July 1,		June 25,		July 1,		June 25,
	2023		2022		2023		2022
Weighted average common shares		47,618		48,475		47,481		48,626
Effect of dilutive securities		410		453		618		622
		48,028		48,928		48,099		49,248

Disaggregation of Revenue [Table Text Block]

	Three Months Ended				Six Months Ended
Disaggregated Net Sales	July 1, 2023		June 25, 2022		July 1, 2023		June 25, 2022
Systems	$	87,312	$	131,951	$	190,296	$	249,300
Non-systems		81,609		85,275		157,996		165,683
Total net sales	$	168,921	$	217,226	$	348,292	$	414,983

	Three Months Ended				Six Months Ended
Disaggregated Net Sales	July 1, 2023		June 25, 2022		July 1, 2023		June 25, 2022
Philippines	$	25,359	$	21,562	$	57,149	$	45,947
Malaysia		23,258		28,857		55,153		48,973
China		28,394		46,585		49,504		85,238
United States		15,750		19,553		34,493		43,316
Rest of the World		76,160		100,669		151,993		191,509
Total net sales	$	168,921	$	217,226	$	348,292	$	414,983

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

	Three Months Ended					Six Months Ended
	July 1,			June 25,		July 1,			June 25,
	2023			2022		2023			2022
Customers individually accounting for more than 10% of net sales	two				*	one				*
Percentage of net sales		25	%		*		13	%		*