Employee Stock Plans (Tables)

12 Months Ended

Dec. 30, 2022

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Stock-Based Compensation Expense Included in Condensed Consolidated Statements of Operations

Total stock-based compensation during the fiscal years 2022, 2021 and 2020, respectively, in various expense categories was as follows:

	Year Ended
	December 30,		December 31,		December 25,
(In millions)	2022		2021		2020
Cost of revenues (1)	$	1.5	$	2.0	$	1.8
Research and development		0.3		0.2		0.1
Sales and marketing		1.3		1.3		1.3
General and administrative		16.0		12.3		9.5
Total stock-based compensation	$	19.1	$	15.8	$	12.7

(1)Stock-based compensation expenses capitalized in inventory for fiscal years 2022, 2021 and 2020 were immaterial.

Summary of Restricted Stock Unit and Restricted Stock Award Activity

The following table summarizes the Company’s PSUs, RSUs and RSAs activities through the year ended December 30, 2022:

				Aggregate
				Intrinsic
	Number of			Value
	Shares			(In millions)
Unvested restricted stock units and restricted stock awards at December 25, 2020		1.7		$	54.1
Granted		0.4
Vested		(0.8	)
Forfeited		(0.1	)
Unvested restricted stock units and restricted stock awards at December 31, 2021		1.2		$	69.3
Granted		0.7
Vested		(0.7	)
Forfeited		(0.1	)
Unvested restricted stock units and restricted stock awards at December 30, 2022		1.1		$	37.6
Vested and expected to vest restricted stock units and restricted stock    awards		1.1		$	37.6

Performance Shares [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Summary for PSU awards Company used for the Monte Carlo simulation

For the PSU awards, the Company used the following inputs for the Monte Carlo simulation:

	Year Ended
	December 30,			December 31,			December 25,
	2022			2021			2020
Stock price	$	32.17		$	52.73		n/a
Term	2.68 years			2.67 years			n/a
Expected volatilities		65.9	%		64.7	%	n/a
Risk-free rate		2.7	%		0.3	%	n/a