Note 11 - Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Year Ended
	December 31,		January 1,		January 2,
(In thousands)	2022		2022		2021
Cost of revenue	$	3,674	$	3,049	$	3,179
Research and development		19,645		14,563		10,124
Selling, general, and administrative		32,211		28,863		27,069
Total stock-based compensation	$	55,530	$	46,475	$	40,372

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

	Year Ended
	December 31,	January 1,	January 2,
	2022	2022	2021
Employee Stock Purchase Plan
Weighted average expected volatility	60.3%	39.9%	48.2%
Weighted average risk-free interest rate	3.74%	0.07%	0.89%
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, January 1, 2022		1,367		$	6.62
Granted		—			—
Exercised		(448	)		6.48
Forfeited or expired		(1	)		5.01
Balance, December 31, 2022		918		$	6.70
Vested and expected to vest at December 31, 2022		918		$	6.70		1.93	$	53,433
Exercisable, December 31, 2022		918		$	6.70		1.93	$	53,433

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

(Shares in thousands)	Shares			Weighted average grant date fair value
Balance, January 1, 2022		2,188		$	31.85
Granted		843			62.23
Vested		(1,132	)		24.34
Forfeited or expired		(78	)		41.21
Balance, December 31, 2022		1,821		$	50.18

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

	Year Ended
	December 31,	January 1,	January 2,
	2022	2022	2021
Executive RSUs with a market condition or performance condition
Weighted average expected volatility	51.44%	50.37% to 52.11%	42.38%
Weighted average risk-free interest rate	1.67%	0.22% to 0.77%	1.40%
Expected term (years)	3.00	3.00 to 5.00	3.00

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

(Shares in thousands)	Shares			Weighted average grant date fair value
Balance, January 1, 2022		1,246		$	41.23
Granted		183			96.63
Effect of vesting multiplier		642
Vested		(1,086	)		20.38
Balance, December 31, 2022		985		$	60.15