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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

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				Six Months Ended
	June 30,		July 1,		June 30,		July 1,
	2017		2016		2017		2016
Employee stock options	$	493	$	153	$	761	$	5,049
Restricted stock		46		2		86		227
Restricted stock units		329		145		531		2,423
Nonemployee stock options		–		–		–		59
Total	$	868	$	300	$	1,378	$	7,758

Schedule Of Share-Based Compensation, Stock Options, Activity [Table Text Block]

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

	Three Months Ended				Six Months Ended
	June 30,		July 1,		June 30,		July 1,
	2017		2016		2017		2016
Cost of sales	$	2	$	–	$	4	$	560
General and administrative		394		167		658		3,688
Marketing and selling		228		68		344		1,471
Research and development		244		65		372		2,039
Total stock compensation expense		868		300		1,378		7,758
Amounts capitalized as part of inventory		109		36		162		188
Total	$	977	$	336	$	1,540	$	7,946

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						Six Months Ended
	June 30,			July 1,			June 30,			July 1,
	2017			2016			2017			2016
Expected dividend yield		0	%		0	%		0	%		0	%
Expected volatility		57	%		45	%		57	%		53	%
Risk-free interest rate		1.81	%		1.01	%		1.95	%		1.27	%
Expected term (in years)		5.67			4.40			5.67			5.19

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]

A summary of option activity under the Plan for the six-month period ended June 30, 2017 is presented below:

	Options
	Shares
	(000’s)
Outstanding at December 30, 2016		3,502
Granted		794
Exercised		(288)
Forfeited or expired		(73)
Outstanding at June 30, 2017		3,935
Exercisable at June 30, 2017		2,819

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

A summary of restricted stock and RSU activity under the Plan for the six-month period ended June 30, 2017 is presented below:

	Restricted
	Shares		RSUs
	(000’s)		(000’s)
Outstanding at December 30, 2016		23		274
Granted		21		269
Vested		(23)		(91)
Forfeited		–		(21)
Outstanding at June 30, 2017		21		431