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Stockholders' Equity (Tables)

12 Months Ended

Jan. 03, 2014

Schedule of Employee Service Share-based Compensation [Line Items]

Schedule Of Compensation Cost [Table Text Block]

Stock-based compensation expense is set forth below (in thousands): 

    

		Fiscal Year Ended
		January 3, 2014			December 28, 2012			December 30, 2011
Employee stock options		$	2,683		$	2,595		$	1,361
Restricted stock			999			590			466
Restricted stock units			589			—			—
Consultant compensation			218			23			87
Total		$	4,489		$	3,208		$	1,914

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

The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. Following are the weighted-average assumptions used with the Black-Scholes option-pricing model to determine the fair value estimates of options granted: 

		Fiscal Year Ended
		January 3, 2014				December 28, 2012				December 30, 2011
Expected dividend yield			0	%			0	%			0	%
Expected volatility			71	%			79	%			77	%
Risk-free interest rate			0.73	%			0.82	%			1.82	%
Expected term (in years)			4.12				5.21				5.49

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

A summary of option activity under the Plan as of January 3, 2014 is presented below:

Options			Shares (000’s)			Weighted- Average Exercise Price			Weighted- Average Remaining Contractual Term			Aggregate Intrinsic Value (000’s)
Outstanding at December 28, 2012			3,376		$	5.89
Granted			603			6.77
Exercised			(645)			5.10
Forfeited or expired			(35)			8.53
Outstanding at January 3, 2014			3,299		$	6.17			6.27		$	32,745
Exercisable at January 3, 2014			2,168		$	5.30			5.04			23,405

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

The fair value of the warrants was estimated on the issuance date, June 1, 2009, using a Black-Scholes option valuation model applying the assumptions noted in the following table:

		As of  June 1, 2009
Common stock price per share		$	1.01
Number of warrants			700,000
Expected dividends			0	%
Expected volatility			74.4	%
Risk-free rate			3.28	%
Life (in years)			6.0

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following table summarizes information about stock options outstanding and exercisable at January 3, 2014 (in thousands, except per share data):

Range of Exercise Prices			Number Outstanding at January 3, 2014				Options Outstanding Weighted-Average Remaining Contractual Life		Weighted- Average Exercise Price		Number Exercisable at January 3, 2014				Weighted- Average Exercise Price
$	0.95				29		5.24 Years		$	0.95			29		$	0.95
$	1.56 to $2.30				320		4.30 Years		$	2.19			320		$	2.19
$	2.45 to $3.60				177		5.48 Years		$	3.29			177		$	3.29
$	3.75 to $5.29				506		3.16 Years		$	4.22			497		$	4.20
$	5.34 to $7.32				1,457		6.96 Years		$	5.71			817		$	5.89
$	7.50 to $13.34				810		7.94 Years		$	10.61			328		$	10.00
					3,299		6.27 Years		$	6.17			2,168		$	5.30

Schedule Of Warrant Activity [Table Text Block]

A summary of warrants to purchase Company stock issued to Broadwood as discussed in Note 9 as of January 3, 2014 is presented below:

Warrants		Shares (000’s)			Weighted- Average Exercise Price			Weighted- Average Remaining Contractual Term			Aggregate Intrinsic Value (000’s)
Outstanding at December 28, 2012			1,470		$	4.10
Granted			—			—
Exercised			700			4.00
Forfeited or expired			70			6.00
Outstanding at January 3, 2014			700		$	4.00			1.41		$	8,470
Exercisable at January 3, 2014			700		$	4.00			1.41		$	8,470

Restricted Stock [Member]

Schedule of Employee Service Share-based Compensation [Line Items]

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

A summary of restricted stock as of January 3, 2014 is presented below:

Restricted Stock		Shares (000’s)				Weighted Average Grant-Date Fair Value per Share
Outstanding at December 28, 2012			205			$	8.48
Granted			154				6.58
Forfeited			—				—
Vested			(18)				9.90
Outstanding at January 3, 2014			341			$	7.55

Restricted Stock Units (RSUs) [Member]

Schedule of Employee Service Share-based Compensation [Line Items]

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

A summary of restricted stock units as of January 3, 2014 is presented below:

		Units (000’s)				Weighted Average Grant-Date Fair Value per Share
Outstanding at December 28, 2012			—			$	—
Granted			135				5.34
Forfeited			—				—
Vested			—				—
Outstanding at January 3, 2014			135			$	5.34

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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