Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 30, 2023

Notes Tables

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

(in thousands)	2023		2022		2021
Weighted average common shares outstanding		47,486		48,178		47,409
Effect of dilutive stock options and restricted stock units		539		621		1,051
		48,025		48,799		48,460

Schedule of Inventory, Current [Table Text Block]

	December 30,		December 31,
	2023		2022
Raw materials and purchased parts	$	103,118	$	106,041
Work in process		26,820		36,024
Finished goods		25,855		28,076
Total inventories	$	155,793	$	170,141

Property, Plant and Equipment [Table Text Block]

	December 30,			December 31,
	2023			2022
Land and land improvements	$	7,301		$	7,066
Buildings and building improvements		39,677			31,161
Machinery and equipment		108,831			105,109
		155,809			143,336
Less accumulated depreciation and amortization		(86,724	)		(78,325	)
Property, plant and equipment, net	$	69,085		$	65,011

Disaggregation of Revenue [Table Text Block]

(in thousands)	2023		2022		2021
Systems-Semiconductor Test & Inspection	$	326,448	$	474,655	$	541,589
Non-systems-Semiconductor Test & Inspection		309,874		338,120		318,865
Systems-PCB Test		-		-		17,831
Non-systems-PCB Test		-		-		8,929
Net sales	$	636,322	$	812,775	$	887,214