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Stockholders’ Equity and Stock-Based Compensation (Tables)

3 Months Ended

Mar. 28, 2020

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 28, 2019			3,069,000						$	14.30
Awards granted			16,000						26.05
Awards vested			(43,604)						12.70
Awards forfeited			(20,291)						14.25
RSUs at March 28, 2020			3,021,105						$	14.39

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 28, 2019						361,769						$	8.35
Options exercised						(55,769)						8.01
Outstanding at March 28, 2020						306,000						$	8.41					1.88						$	3,607,620
Vested and expected to vest at March 28, 2020						306,000						$	8.41					1.88						$	3,607,620
Exercisable at March 28, 2020						306,000						$	8.41					1.88						$	3,607,620

Schedule of ESPP Activity

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

						Three Months Ended
						March 28, 2020
Shares issued						311,591
Weighted average per share purchase price						$	13.05
Weighted average per share discount from the fair value of our common stock on the date of issuance						$	12.26

Schedule of Stock-based Compensation

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

			Three Months Ended
			March 28, 2020						March 30, 2019
Cost of revenues			$	937					$	950
Research and development			1,439						1,519
Selling, general and administrative			3,247						2,826
Total stock-based compensation			$	5,623					$	5,295

Schedule of Unrecognized Stock-based Compensation

At March 28, 2020, the unrecognized stock-based compensation was as follows (dollars in thousands): 

			Unrecognized Expense						Average Expected Recognition Period in Years
Restricted stock units			$	20,158					1.79
Performance restricted stock units			5,544						1.79
Employee stock purchase plan			662						0.85
Total unrecognized stock-based compensation expense			$	26,364					1.77

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