Stock-Based Compensation (Tables)

9 Months Ended

Sep. 28, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expense

Total stock-based compensation expense included in our Consolidated Statements of Operations is presented in the following table:

	Three Months Ended				Nine Months Ended
(In thousands)	September 28, 2019		September 29, 2018		September 28, 2019		September 29, 2018
Cost of products sold	$	453	$	219	$	982	$	652
Research and development	1,658		926		4,029		2,970
Selling, general, and administrative	3,569		1,563		8,324		6,286
Total stock-based compensation	$	5,680	$	2,708	$	13,335	$	9,908

Schedule of Share-based Compensation, Performance Shares, Activity

The following table summarizes the activity for our awards with a market or performance condition during the first nine months of fiscal 2019:

(Shares in thousands)	Total
Balance, December 29, 2018	909
Granted	584
Effect of vesting multiplier	187
Vested	(338	)
Canceled	(106	)
Balance, September 28, 2019	1,236