Employee Stock Plans (Tables)

9 Months Ended

Sep. 30, 2022

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				Nine Months Ended
	September 30,		September 24,		September 30,		September 24,
(In millions)	2022		2021		2022		2021
Cost of revenues (1)	$	0.1	$	0.5	$	1.1	$	1.4
Research and development		0.1		0.1		0.3		0.2
Sales and marketing		0.4		0.3		1.0		1.0
General and administrative		4.1		3.4		12.4		8.9
Stock-based compensation expense		4.7		4.3		14.8		11.5

(1)Stock-based compensation expense capitalized in inventory for the three and nine months ended September 30, 2022 and September 24, 2021 and September 24, 2021 was not significant.

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 nine months ended September 30, 2022:

(In millions)	Shares			Aggregate Fair Value
Unvested RSUs, PSUs and RSAs at December 31, 2021		1.2		$	69.3
Granted		0.7			-
Vested		(0.6	)		-
Forfeited		(0.1	)		-
Unvested RSUs, PSUs and RSAs as of September 30, 2022		1.2		$	30.0
Vested and expected to vest RSUs, PSUs and RSAs as of September 30, 2022		1.2		$	30.0