Stock-Based Compensation (Tables)

6 Months Ended

Jun. 29, 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				Six Months Ended
(In thousands)	June 29, 2019		June 30, 2018		June 29, 2019		June 30, 2018
Cost of products sold	$	327	$	196	$	529	$	433
Research and development	1,246		837		2,371		2,044
Selling, general, and administrative	2,396		1,367		4,755		4,723
Total stock-based compensation	$	3,969	$	2,400	$	7,655	$	7,200

Share-based Compensation, Stock Options, Activity

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

(Shares in thousands)	Unvested		Vested	Total
Balance, December 29, 2018	909		—	909
Granted	265		—	265
Canceled	(106	)	—	(106	)
Balance, June 29, 2019	1,068		—	1,068