Note 10 - Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 30, 2023

Notes Tables

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

	Year Ended
	December 30,		December 31,		January 1,
(In thousands)	2023		2022		2022
Cost of revenue	$	4,506	$	3,674	$	3,049
Research and development		27,782		19,645		14,563
Selling, general, and administrative		37,909		32,211		28,863
Total stock-based compensation	$	70,197	$	55,530	$	46,475

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

	Year Ended
	December 30,	December 31,	January 1,
	2023	2022	2022
Employee Stock Purchase Plan
Weighted average expected volatility	48.2%	60.3%	39.9%
Weighted average risk-free interest rate	5.37%	3.74%	0.07%
Expected term (in months)	6	6	6

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

(Shares and aggregate intrinsic value in thousands)	Shares			Weighted average exercise price		Weighted average remaining contractual term (years)		Aggregate Intrinsic Value
Balance, December 31, 2022		918		$	6.70
Granted		—			—
Exercised		(487	)		6.66
Forfeited or expired		(3	)		5.84
Balance, December 30, 2023		428		$	6.75
Vested and expected to vest at December 30, 2023		428		$	6.75		1.16	$	26,626
Exercisable, December 30, 2023		428		$	6.75		1.16	$	26,626

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

(Shares in thousands)	Shares			Weighted average grant date fair value
Balance, December 31, 2022		1,821		$	50.18
Granted		995			84.80
Vested		(880	)		41.63
Forfeited or expired		(55	)		56.69
Balance, December 30, 2023		1,881		$	72.31

Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block]

	Year Ended
	December 30,	December 31,	January 1,
	2023	2022	2022
Executive RSUs with a market condition or performance condition
Weighted average expected volatility	50.97% to 54.31%	51.44%	50.37% to 52.11%
Weighted average risk-free interest rate	4.28% to 4.59%	1.67%	0.22% to 0.77%
Expected term (years)	3	3	3 to 5

Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block]

(Shares in thousands)	Shares			Weighted average grant date fair value
Balance, December 31, 2022		985		$	60.15
Granted		172			146.69
Effect of vesting multiplier		334
Vested		(639	)		40.22
Balance, December 30, 2023		852		$	84.73