Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [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
(In thousands)	March 31, 2018		April 1, 2017
Cost of products sold	$	237	$	228
Research and development	1,207		1,850
Selling, general, and administrative	3,356		1,765
Total stock-based compensation	$	4,800	$	3,843

Share-based Compensation, Stock Options, Activity

The following table summarizes the activity for our stock options with a market condition during the first quarter of fiscal 2018:

(Shares in thousands)	Unvested		Vested		Total
Balance, December 30, 2017	707		83		790
Vested	(31	)	31		—
Canceled	31		(10	)	21
Balance, March 31, 2018	707		104		811