Stockholders’ Equity and Stock-Based Compensation (Tables)

9 Months Ended

Sep. 28, 2019

Equity [Abstract]

Schedule of Restricted Stock Unit Activity

Restricted stock unit ("RSU") activity under our equity incentive plan was as follows:

 

	Units		Weighted Average Grant Date Fair Value
RSUs at December 29, 2018	3,102,226		$	12.79
Awards granted	1,487,200		15.01
Awards vested	(1,366,925	)	11.89
Awards forfeited	(130,677	)	13.35
RSUs at September 28, 2019	3,091,824		$	14.24

Schedule of Stock Option Activity

Stock option activity under our equity incentive plan was as follows:

	Options Outstanding		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years	Aggregate Intrinsic Value
Outstanding at December 29, 2018	524,725		$	8.00
Options exercised	(112,956	)	6.67
Outstanding at September 28, 2019	411,769		$	8.36	2.40	$	4,167,393
Vested and expected to vest at September 28, 2019	411,769		$	8.36	2.40	$	4,167,393
Exercisable at September 28, 2019	411,769		$	8.36	2.40	$	4,167,393

Schedule of ESPP Activity

Information related to activity under our Employee Stock Purchase Plan ("ESPP") was as follows:

	Nine Months Ended
	September 28, 2019
Shares issued	544,271
Weighted average per share purchase price	$	12.51
Weighted average per share discount from the fair value of our common stock on the date of issuance	$	3.40

Schedule of Stock-based Compensation

Stock-based compensation was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 28, 2019		September 29, 2018		September 28, 2019		September 29, 2018
Cost of revenues	$	1,117	$	832	$	3,031	$	2,565
Research and development	1,729		1,312		4,830		3,870
Selling, general and administrative	3,658		2,393		9,227		5,986
Total stock-based compensation	$	6,504	$	4,537	$	17,088	$	12,421

 

Schedule of Unrecognized Stock-based Compensation

At September 28, 2019, the unrecognized stock-based compensation was as follows (dollars in thousands): 

	Unrecognized Expense		Average Expected Recognition Period in Years
Restricted stock units	$	27,942	2.11
Performance restricted stock units	7,597		2.17
Employee stock purchase plan	1,114		0.34
Total unrecognized stock-based compensation expense	$	36,653	2.07