Note 6 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 28, 2024

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

(in thousands)	2024			2023			2022
Service cost	$	643		$	551		$	954
Interest cost		357			510			56
Expected return on assets		(283	)		(331	)		(128	)
Settlements		(277	)		(177	)		(487	)
Net periodic costs	$	440		$	553		$	395

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

(in thousands)	2024			2023
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	(24,884	)	$	(21,628	)
Service cost		(643	)		(551	)
Interest cost		(357	)		(510	)
Actuarial gain (loss)		79			(1,391	)
Participant contributions		(988	)		(1,153	)
Benefits paid		599			385
Plan change		203			-
Settlements		2,820			2,177
Foreign currency exchange adjustment		1,660			(2,213	)
Benefit obligation at end of year		(21,511	)		(24,884	)
Change in plan assets:
Fair value of plan assets at beginning of year		19,700			18,411
Return on assets, net of actuarial gain/loss		732			52
Employer contributions		783			860
Participant contributions		988			1,153
Benefits paid		(599	)		(385	)
Settlements		(2,820	)		(2,177	)
Foreign currency exchange adjustment		(1,326	)		1,786
Fair value of plan assets at end of year		17,458			19,700
Net liability at end of year	$	(4,053	)	$	(5,184	)

Defined Benefit Plan, Assumptions [Table Text Block]

	2024			2023
Discount rate		1.1	%		1.5	%
Compensation increase		1.0	%		2.0	%

	2024			2023			2022
Discount rate		1.1	%		1.5	%		2.3	%
Rate of return on assets		1.3	%		1.5	%		1.8	%
Compensation increase		1.0	%		2.0	%		3.0	%

Schedule of Net Funded Status [Table Text Block]

(in thousands)	2024			2023
Accumulated benefit obligation at beginning of year	$	(1,651	)	$	(1,657	)
Interest cost		(75	)		(78	)
Actuarial (gain) loss		25			(6	)
Benefits paid		109			90
Accumulated benefit obligation at end of year		(1,592	)		(1,651	)
Plan assets at end of year		-			-
Funded status	$	(1,592	)	$	(1,651	)

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

	2024					2023					2022
				Wt. Avg.					Wt. Avg.					Wt. Avg.
(in thousands, except per share data)	Units			Fair Value		Units			Fair Value		Units			Fair Value
Outstanding, beginning of year		884		$	30.52		969		$	24.55		1,058		$	21.16
Granted		411		$	31.76		365		$	36.66		431		$	27.74
Released		(366	)	$	27.33		(428	)	$	22.33		(474	)	$	19.94
Cancelled		(44	)	$	31.92		(22	)	$	28.62		(46	)	$	24.33
Outstanding, end of year		885		$	32.34		884		$	30.52		969		$	24.55

Schedule of Nonvested Performance-Based Units Activity [Table Text Block]

	2024					2023					2022
				Wt. Avg.					Wt. Avg.					Wt. Avg.
(in thousands, except per share data)	Units			Fair Value		Units			Fair Value		Units			Fair Value
Outstanding, beginning of year		408		$	45.65		403		$	28.64		384		$	22.22
Granted		203		$	33.78		270		$	39.97		151		$	33.22
Released		(63	)	$	57.39		(258	)	$	13.18		(55	)	$	14.11
Cancelled		(9	)	$	57.39		(7	)	$	42.52		(77	)	$	15.94
Outstanding, end of year		539		$	39.64		408		$	45.65		403		$	28.64

Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

Employee Stock Purchase Plan	2024			2023			2022
Expected volatility		35.5	%		36.3	%		45.6	%
Risk-free interest rate		5.3	%		4.5	%		1.2	%
Expected term (years)		0.5			0.5			0.5
Weighted-average grant date fair value per share	$	7.49		$	8.54		$	8.79

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

(in thousands)	2024			2023			2022
Cost of sales	$	1,049		$	845		$	646
Research and development		3,566			3,394			3,100
Selling, general and administrative		16,125			12,998			11,172
Share-based compensation		20,740			17,237			14,918
Income tax benefit		(211	)		(1,770	)		(4,004	)
Total share-based compensation, net of tax	$	20,529		$	15,467		$	10,914