Employee Benefit Plans (Tables)

6 Months Ended

Jun. 28, 2020

Employee Benefits And Share Based Compensation [Abstract]

Schedule of Stock Option Activity

Stock option activity during the six months ended June 28, 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		(190	)	$	20.00
Cancelled		(20	)	$	35.85
Expired		(3	)	$	22.06
Outstanding as of June 28, 2020		1,975		$	26.51

Schedule of RSU Activity

RSU activity during the six months ended June 28, 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		682		$	24.98
Vested		(486	)	$	33.11
Cancelled		(53	)	$	36.25
Outstanding as of June 28, 2020		1,730		$	30.58

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 six months ended June 28, 2020 and June 30, 2019:

	Six Months Ended
	June 28, 2020			June 30, 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				Six Months Ended
	June 28, 2020		June 30, 2019		June 28, 2020		June 30, 2019
	(In thousands)
Cost of revenue	$	1,501	$	755	$	2,206	$	1,423
Research and development		1,707		1,288		2,741		2,480
Sales and marketing		1,890		2,085		3,669		4,126
General and administrative		4,074		2,611		6,892		5,168
Total	$	9,172	$	6,739	$	15,508	$	13,197