Stock-Based Compensation (Tables)

3 Months Ended

Apr. 01, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule Of Compensation Cost [Table Text Block]

The cost that has been charged against income for stock-based compensation is set forth below (in thousands):

	Three Months Ended
	April 1, 2016		April 3, 2015
Employee stock options	$	4,896	$	638
Restricted stock		225		244
Restricted stock units		2,280		119
Nonemployee stock options		57		(7)
Total	$	7,458	$	994

Schedule of Share-based Compensation, Activity [Table Text Block]

The Company recorded stock-based compensation cost in the following categories on the accompanying condensed consolidated statements of operations (in thousands):

	Three Months Ended
	April 1, 2016		April 3,  2015
Cost of sales	$	560	$	10
General and administrative		3,394		583
Marketing and selling		1,531		251
Research and development		1,973		150
Total stock compensation expense		7,458		994
Amounts capitalized as part of inventory		152		122
Total	$	7,610	$	1,116

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The risk-free rate is based on the U.S. Treasury yield curve corresponding to the expected term at the time of the grant.

	Three Months Ended
	April 1, 2016			April 3, 2015
Expected dividend yield		0	%		0	%
Expected volatility		57	%		57	%
Risk-free interest rate		1.40	%		1.70	%
Expected term (in years)		5.57			5.64

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of option activity under the Plan for the period ended April 1, 2016 is presented below:

	Options Shares (000’s)
Outstanding at January 1, 2016		3,623
Granted		486
Exercised		(1)
Forfeited or expired		(61)
Outstanding at April 1, 2016		4,047
Exercisable at April 1, 2016		3,674

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

A summary of restricted stock and restricted stock units activity under the Plan for the period ended April 1, 2016 is presented below:

	Restricted Shares (000’s)		Restricted Units (000’s)
Outstanding at January 1, 2016		124		339
Granted		—		233
Vested		(124)		(380)
Forfeited		—		(4)
Outstanding at April 1, 2016		—		188