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Stock-Based Compensation (Tables)

6 Months Ended

Jul. 03, 2016

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

Schedule of stock based compensation expense

The stock-based compensation expense included in the Company's consolidated financial statements for the three and six months ended July 3, 2016 and June 28, 2015 was as follows (in thousands):

	Three Months Ended								Six Months Ended
	July 3, 2016				June 28, 2015				July 3, 2016				June 28, 2015
Cost of revenue	$	47			$	27			$	85			$	66
Research and development	175				212				466				403
Selling, general and administrative	217				252				450				519
Total costs and expenses	$	439			$	491			$	1,001			$	988

Schedule of weighted average assumptions included in the estimated fair value calculations for stock option grants

The following weighted average assumptions are included in the estimated fair value calculations for stock option grants:

	Three Months Ended						Six Months Ended
	July 3, 2016			June 28, 2015			July 3, 2016			June 28, 2015
Expected term (years)	0			0			0			4.78
Risk-free interest rate	—	%		—	%		—	%		1.40	%
Expected volatility	—	%		—	%		—	%		52.11	%
Expected dividend yield	—			—			—			—

Summary of the activity in the shares available for grant under the 2009 plan

The following table summarizes the activity in the shares available for grant under the 2009 Plan during the six months ended July 3, 2016:

	Shares Available for Grant
	(in thousands)
Balance at January 03, 2016	2,929
Options forfeited or expired	373
RSUs granted	(612	)
PRSUs granted	(193	)
RSUs forfeited or expired	159
PRSUs forfeited or expired	201
Balance at July 3, 2016	2,857

Summary of stock options outstanding and stock option activity under the 1999 plan and the 2009 plan, and the related weighted average exercise price

The following table summarizes stock options outstanding and stock option activity under the 1999 Plan and the 2009 Plan, and the related weighted average exercise price, for the first six months of 2016:

	Number of Shares			Weighted Average Exercise Price				Weighted Average Remaining Term		Aggregate Intrinsic Value
	(in thousands)							(in years)		(in thousands)
Balance outstanding at January 3, 2016	5,266			$	2.64
Forfeited or expired	(373	)		$	2.74
Balance outstanding at July 3, 2016	4,893			$	2.63			3.82		$	17
Exercisable at July 3, 2016	4,542			$	2.62			3.50		$	17
Vested and expected to vest at July 3, 2016	4,838			$	2.63			3.77		$	17

Summary of activity for RSUs and PRSUs

A summary of activity for the Company's RSUs and PRSUs for the six months ended July 3, 2016 and information regarding RSUs and PRSUs outstanding and expected to vest as of July 3, 2016 is as follows:

	RSUs & PRSUs Outstanding
	Number of Shares			Weighted Average Grant Date Fair Value
	(in thousands)
Nonvested at January 3, 2016	1,435			$	2.30
Granted	805			1.11
Vested	(442	)		1.04
Forfeited	(360	)		—
Nonvested at July 3, 2016	1,438			$	2.08

Summary of the fair value of rights issued pursuant to ESPP

The fair value of rights issued pursuant to the Company's 2009 ESPP was estimated on the commencement date of each offering period using the following weighted average assumptions:

	Three Months Ended						Six Months Ended
	July 3, 2016			June 28, 2015			July 3, 2016			June 28, 2015
Expected term (months)	6.08			6.08			6.08			6.08
Risk-free interest rate	0.40	%		0.08	%		1.04	%		0.08	%
Volatility	54.31	%		51.54	%		61.06	%		51.54	%
Dividend yield	—			—			—			—

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-SubTopic 10
-Section 50
-Paragraph 1
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
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Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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