Employee Benefit Plans (Tables)

3 Months Ended

Mar. 29, 2020

Employee Benefits And Share Based Compensation [Abstract]

Schedule of Stock Option Activity

Stock option activity during the three months ended March 29, 2020 was as follows:

	Number of Shares			Weighted Average Exercise Price Per Share
	(In thousands)			(In dollars)
Outstanding as of December 31, 2019		2,188		$	26.03
Exercised		(22	)	$	20.87
Expired		(3	)	$	22.07
Outstanding as of March 29, 2020		2,163		$	26.09

Schedule of RSU Activity

RSU activity during the three months ended March 29, 2020 was as follows:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
	(In thousands)			(In dollars)
Outstanding as of December 31, 2019		1,587		$	33.95
Granted		40		$	26.08
Vested		(151	)	$	40.20
Cancelled		(17	)	$	36.02
Outstanding as of March 29, 2020		1,459		$	33.07

Schedule of Weighted Average Assumptions

The following table sets forth the weighted average assumptions used to estimate the fair value of purchase rights granted under the ESPP during the three months ended March 29, 2020 and March 31, 2019:

	Three Months Ended
	March 29, 2020			March 31, 2019
	ESPP
Expected life (in years)		0.5			0.5
Risk-free interest rate		1.55	%		2.49	%
Expected volatility		38.8	%		42.6	%
Dividend yield		—			—

Schedule of Total Stock-Based Compensation Expense Resulting from Stock Options, RSUs, and the ESPP

The following table sets forth the stock-based compensation expense resulting from stock options, RSUs and the ESPP included in the Company’s unaudited condensed consolidated statements of operations:

	Three Months Ended
	March 29, 2020		March 31, 2019
	(In thousands)
Cost of revenue	$	705	$	668
Research and development		1,034		1,192
Sales and marketing		1,779		2,041
General and administrative		2,818		2,557
Total	$	6,336	$	6,458