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Stockholders' Equity (Tables)

12 Months Ended

Dec. 29, 2017

Schedule of Share-based Compensation, Fair Value of Stock Compensation Granted [Table Text Block]

The following table represents the fair value of stock compensation granted during the year ended December 29, 2017:

		Fair Value
Stock Options		$	4,985
Restricted Stock Units			3,586
Restricted Stock			200
Total		$	8,771

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):

		Fiscal Year Ended
		December 29, 2017			December 30, 2016			January 1, 2016
Employee stock options		$	1,731		$	5,485		$	2,306
Restricted stock			186			298			485
Restricted stock units			1,226			2,717			452
Consultant compensation			18			58			61
Total		$	3,161		$	8,558		$	3,304

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

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

		Fiscal Year Ended
		December 29, 2017			December 30, 2016			January 1, 2016
Cost of Sales		$	8		$	612		$	52
General and administrative			1,487			3,809			2,090
Marketing and selling			805			1,961			696
Research and development			861			2,176			466
Total stock-based compensation expense			3,161			8,558			3,304
Amounts capitalized as part of inventory			372			269			516
Total stock-based compensation		$	3,533		$	8,827		$	3,820

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.

		Fiscal Year Ended
		December 29,				December 30,				January 1,
		2017				2016				2016
Expected dividend yield			0	%			0	%			0	%
Expected volatility			57	%			57	%			57	%
Risk-free interest rate			1.96	%			1.34	%			1.59	%
Expected term (in years)			5.67				5.57				5.57

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

A summary of option activity under the Plan for the year ended December 29, 2017 is presented below:

Options		Shares (000’s)			Weighted- Average Exercise Price			Weighted- Average Remaining Contractual Term (years)				Aggregate Intrinsic Value (000’s)
Outstanding at December 30, 2016			3,502		$	8.28
Granted			956			10.19
Exercised			(557)			7.12
Forfeited or expired			(176)			11.62
Outstanding at December 29, 2017			3,725		$	8.78				6.96		$	25,069
Exercisable at December 29, 2017			2,577		$	8.38				6.00		$	18,395

Share-based Compensation, Performance Shares Award Unvested Activity [Table Text Block]

A summary of unvested options activity under the Plan for the year ended December 29, 2017 is presented below:

						Weighted-
						Average
		Shares				Grant-Date
Options		(000’s)				Fair Value
Unvested at December 30, 2016			662			$	3.84
Granted during the year			956				5.42
Forfeited or expired during the year			(176)				5.53
Vested during the year			(294)				5.14
Unvested at December 29, 2017			1,148			$	4.96

Restricted Stock [Member]

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

A summary of restricted stock activity for the year ended December 29, 2017 is presented below:

					Weighted
					Average
					Grant-Date
		Shares			Fair Value
Restricted Stock		(000’s)			per Share
Outstanding at December 30, 2016			23		$	6.47
Granted			21			9.60
Vested			(23)			6.47
Outstanding at December 29. 2017			21		$	9.60

Restricted Stock Units (RSUs) [Member]

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

A summary of restricted stock units’ activity for the year ended December 29, 2017 is presented below:

		Units (000’s)			Weighted Average Grant-Date Fair Value per Share
Outstanding at December 30, 2016			274		$	7.60
Granted			345			10.39
Vested			(96)			7.76
Forfeited or expired			(35)			8.81
Outstanding at December 29, 2017			488		$	9.45

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