Employee Stock Plans (Tables)

6 Months Ended

Jun. 30, 2023

Postemployment Benefits [Abstract]

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

The following table shows the Company’s stock-based compensation expense included in the Condensed Consolidated Statements of Operations:

	Three Months Ended				Six Months Ended
	June 30,		July 1,		June 30,		July 1,
(In millions)	2023		2022		2023		2022
Cost of revenues (1)	$	0.3	$	0.5	$	0.6	$	1.0
Research and development		0.1		0.1		0.1		0.2
Sales and marketing		0.3		0.3		0.7		0.6
General and administrative		0.3		3.6		3.3		8.3
Total stock-based compensation	$	1.0	$	4.5	$	4.7	$	10.1

(1)Stock-based compensation expense capitalized in inventory for the three and six months ended June 30, 2023 and July 1, 2022 were immaterial.

Summary of Restricted Stock Unit, Performance Stock Units and Restricted Stock Award Activity

The following table summarizes the Company’s combined RSU, PSU and RSA activity for the six months ended June 30, 2023 (in millions):

				Aggregate
	Number of			Intrinsic
	Shares			Value
Unvested restricted stock units and restricted stock awards at December 30, 2022		1.1		$	37.6
Granted		0.8
Vested		(0.5	)
Forfeited		—
Unvested restricted stock units and restricted stock awards at June 30, 2023		1.4		$	52.4
Vested and expected to vest restricted stock units and restricted stock    awards		1.4		$	52.4